Students Break World Record for Longest Human Electrical Circuit Using Energy Stick

After several practice runs and dress rehearsals, the students at Coulson Tough Elementary in The Woodlands, Texas broke the World Record for the world’s longest human electrical circuit on October 24, 2013.

The students at Tough Elementary in Texas broke the World Record for longest human electrical circuit

Every student in the school, from kindergarten to sixth grade participated in holding hands in a giant circle around the playground to complete an electrical circuit. The school used an Energy Stick from Steve Spangler Science that buzzed and lit up when the circuit was complete.

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The Best Fake Blood Recipes for Halloween

There is a science to making the most realistic-looking blood. Put on your scientist safety glasses and get ready for a little experimentation.

Most of the recipes below require only a few ingredients, but don’t get caught up in the exact measurements. It’s all about adding a little of this and a little of that until you get the right color and consistency.

The Goriest, Tastiest, Realistic Fake Blood Recipes | Steve Spangler Science

This fake blood will also be safe to dribble a little out of your mouth, because they are completely edible. But many will stain, so be prepared to look a little funny on November 1st and don’t rub it on clothing you don’t want permanently bloodied. You can wash everything with OxiClean® – it does a great job to remove stains.

Use a white towel, napkin or your skin to test the blood. It will look differently in the blender than it does on your skin. We think blood is red, but it is really reddish-brown. It also isn’t see-through or watery.

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The Absolute Best Slime Recipes for Halloween

We are less than two weeks away from Halloween and what’s more fun than making your own slime? It’s ooey, it’s gooey and perfect for grossing people out as your Booger Slime dangles from your nose. Or whip up a batch of glow in the dark slime and turn off the lights. OR what about slime that you can eat? We have included our very best recipes and batches of slime, just in time for Halloween.

The Absolutely Best Slime Recipes to Make for Halloween | Steve Spangler Science


  • New bottle of Elmer’s glue (8-oz bottle of Elmer’s Glue-All works best)
  • Elmer’s Glue Gel
  • Borax (a powdered soap found at the grocery store)
  • Metamucil or generic-brand fiber (make sure it contains Psyllium fiber)
  • Cornstarch
  • Green Slime or Clear Slime (optional)
  • Glow Powder or Atomic Glow
  • Vampire Slime
  • Pearl Swirl
  • Shaving cream
  • Large mixing bowl
  • Microwavable bowl
  • Plate or cookie sheet
  • Plastic cups (8-oz size works well)
  • Spoon
  • Measuring cup
  • Food coloring or Jell-O for color and flavor
  • Water
  • Paper towels (for cleanup)
  • Zipper-lock bag (to store slime for later)

Set-Up Time
- About 10 minutes

Project Time
- About an hour to make every slime and allow for playtime

Project Location
- Kitchen table or easy to clean location



Halloween Science Activity Guide | Steve Spangler ScienceOld-Fashioned Glue and Borax Silly Putty Slime

This kind of slime is simple to make and uses common ingredients. The consistency is thick and stretchy. To make the slime see-through, substitute Gel Glue for regular white glue.

The measurements do not need to be exact; the proportions are more important.

  • Empty the glue bottle into the mixing bowl.
  • Fill the empty bottle with warm water and shake.
  • Add water to mixing bowl.
  • Add a few drops of food coloring.
  • Measure ½ cup of warm water into a plastic cup and add a teaspoon of Borax powder.
  • Stir the solution and don’t worry if all of the Borax dissolves.
  • Start stirring the glue and water mixture in the bowl and slowly add a little of the Borax solution.
  • It’s time to abandon the spoon and use your hands to mix. Continue to add the Borax solution until the slime reaches the perfect consistency.

The Absolutely Best Slime Recipes to Make for Halloween | Steve Spangler Science

PVA Slime

The Slime-ologists at Steve Spangler Science have created the best slime you’ve ever seen using a PVA formula. PVA, or polyvinyl alcohol, is the substance used in many different products such as garden hoses, contact lens solution and water-soluble packages in detergent “liqui-tabs.”

  • Mix 240 mL (8 oz or 1 cup) of PVA Green, Clear Slime or Atomic Slime from Steve Spangler Science with 60 mL (4 tbsp) cross-linker solution like Borax.
  • Use hands to mix and mush liquid into a slimy consistency.
  • Mix in small plastic spiders, glitter, Water Beads, or Styrofoam beads to create an extra spooky batch for Halloween. Styrofoam beads will make the slime feel like Floam.
  • For Bug Soup Slime add rubber bugs to the slime.

The Absolutely Best Slime Recipes to Make for Halloween | Steve Spangler Science

Shaving Cream Marshmallow Slime

This slime isn’t actually fluffy, but reminds us of marshmallows. It has a different texture than regular slime and comes clean on hands. The shaving cream also makes the slime appear silvery and shimmery.

  • Add shaving cream to either of the recipes above.

The Absolutely Best Slime Recipes to Make for Halloween | Steve Spangler Science

Glow-in-the-Dark Slime

Who doesn’t love things that glow in the dark? It’s especially spooky for Halloween.

The Absolutely Best Slime Recipes to Make for Halloween | Steve Spangler Science

Vampire Slime

Where does slime come from, you ask? Monsters, of course. But thanks to some cool genetic mutations, vampires now have their own slime. Telling the difference between monster slime and vampire slime can be tricky at first glance, unless you know the vampire secret… hold the slime up the light. Ordinary monster slime just looks green (because monster blood is green, dah). Vampire slime, on the other hand, shows its true color when you hold it up to the light because the green turns dark red to reveal what vampires drink… well… you know… that stuff. Leave it to the vampires to find another way to hide their true identity.

The Absolutely Best Slime Recipes to Make for Halloween | Steve Spangler Science

 Snot Slime

Use Clear Slime or make Elmer’s Glue Slime with gel glue.

Fairy Slime

Start with Clear Slime or Gel Glue Elmer’s Slime, then add Pearl Swirl, glitter, confetti and a few Water Beads.

The Absolutely Best Slime Recipes to Make for Halloween | Steve Spangler Science

Glacier GAK Slime

  • Here’s the easiest way to make a big batch of GAK. The measurements do not have to be exact, but it’s a good idea to start with the proportions below for the first batch. Just vary the quantities of each ingredient to get a new and interesting batch of goo.
  • This recipe is based on using the Elmer’s Glue recipe with a brand new 240 mL (8 oz) bottle of Elmer’s Glue. Empty the entire bottle of glue into a mixing bowl. Fill the empty bottle with warm water and shake (okay, put the lid on first and then shake). Pour the glue-water mixture into the mixing bowl and use the spoon to mix well. Go ahead… add a drop or two of food coloring and mix some more.
  • Measure 1/2 cup of warm water into the plastic cup and add a teaspoon of Borax powder to the water. Stir the solution. Don’t worry if all of the powder dissolves.
  • While stirring the glue in the mixing bowl, slowly add a little of the Borax solution. Immediately you’ll feel the long strands of molecules starting to connect. It’s time to abandon the spoon and use your hands to do the serious mixing. Keep adding the Borax solution to the glue mixture (don’t stop mixing) until you get a perfect batch of Elmer’s slime. You might like your slime more stringy while others like firm slime. Hey, you’re the head GAK mixologist – do it your way!
  • When you’re finished playing with your GAK, seal it up in a zipper-lock bag for safekeeping.

The Absolutely Best Slime Recipes to Make for Halloween | Steve Spangler Science

Edible Sewer Slime

What’s better than making slime to squish and squeeze while disgusting your friends? Making slime you can eat. With the right coloring, this edible slime will look like you pulled it from your plumbing. What will your friends say when you drop a piece of sewer slime in your mouth?

Caution: Don’t add anything that isn’t food to this recipe if you plan on putting it in your mouth.

  • Mix 5 mL (1 tsp) of Metamucil with 240 mL (1 cup) of water in a microwavable bowl. The fiber acts as the cross-linker.
  • Add a drop or two of food coloring or Jell-O powder to change the color and flavor.
  • Heat the bowl in the microwave for 4 to 5 minutes or until the slime starts to bubble over the sides of the bowl.
  • Let it cool for a few minutes, and then heat again until it bubbles.
  • You may need to repeat the heating and cooling a few times until the mixture becomes rubbery.
  • Have an adult remove the bowl from the microwave and pour the VERY HOT mixture onto a plate with a spoon.
  • Let cool completely.
  • Drip or let it hang into your mouth
  • Enjoy!

The Absolutely Best Slime Recipes to Make for Halloween | Steve Spangler Science

Edible Oobleck Slime

Caution: Don’t add anything that isn’t food to this recipe if you plan on putting it in your mouth.

  • Pour approximately 1/4 of the box of cornstarch into the mixing bowl and slowly add about 1/2 cup of water. Stir. Sometimes it is easier to mix the cornstarch and water with your bare hands–of course, this only adds to the fun.
  • Continue adding cornstarch and water in small amounts until you get a mixture that has the consistency of honey. It may take a little work to get the consistency just right, but you will eventually end up mixing one box of cornstarch with roughly 1 to 2 cups of water. The mixture gets thicker or more viscous as you add more cornstarch.
  • Once you get it to a good, slimy consistency, add a few drops of food coloring or dry Jell-O and mix. Keep in mind the coloring will stain hands and clothes.
  • Grab a spoonful and drop it in your mouth.

Slime Party Favors

Are you making slime for a Halloween party? Grab a stack of plastic cups and lids and draw jack-o-lantern faces on them. The perfect portioned party favor to take home.

Halloween Glow in the Dark Slime Party Favors | Steve Spangler Science

Steve Spangler Learning DVD's – A Classroom Resource

Do you love Sick Science!™ as much as we do?

Do you lay awake at night wondering who’s torso is performing the experiments (hint it isn’t Steve).

What about that catchy music? Da da da da. Da da da da. Da ding. Ding.

Sick Science! Steve Spangler Science DVD - Hands-on Science Experiments

Sick Science! is all about bringing science to life through hands-on exploration that uses items found right in your own home or classroom. The series will have young scientists engaging with physics demonstrations, uncovering secret messages, unlocking the baby diaper secret, and mixing colors in brand new ways. This “sick” style of learning will capture the minds and imaginations of everyone involved.

The demonstrations are simple and easy to replicate.

Now, you can watch those videos anywhere with our Sick Science! DVD Collection, Volumes One and Two. Each volume comes with 10 hands-on experiments you can do in your home or classroom without a lot of fancy or expensive materials.

Sick Science! Volume 1 DVD - Hands-on Science Experiments

Sick Science™ Volume 1

  • Why Does Water Rise?
  • American Flag Optical Illusion
  • Ultimate Gooey Slime
  • Spooky Halloween Beverage
  • The Coin Drop
  • Dry Ice Bubbling Acid
  • Dry Ice Smoke Ring Launcher
  • Toothpick Star Table Trick
  • Balancing Utensils Table Trick
  • The Tablecloth Trick

All videos end with a question about the experiment. After you watch the experiments, switch over to the Science Behind section where Steve Spangler explains how each experiment works and answers the question (in case you are stumped). He will also show you how to take it further as a science fair project or in-depth learning tool.

Sick Science! Volume 2 DVD - Hands-on Science Experiments

Sick Science™ Volume 2

  • Magic Traveling Flame
  • Amazing 9 Layer Density Tower
  • Pendulum Catch
  • Secret Message
  • Cork in the Bottle
  • Taco Sauce Penny Cleaner
  • Baby Diaper Secret
  • Color Changing Milk
  • Color Mixing Wheel
  • Color Changing Carnations

The videos are aimed at parents and teachers who want to amaze their children and instill a sense of wonder and discovery.

Sick Science! Spooky Halloween DVD - Hands-on Science Experiments

And in time for Halloween, we have a special edition of Sick Science! The Spooky Halloween Science DVD contains 10 slimy, creepy, glowing activities to celebrate the holiday. Here are the experiments that are included -

  • Ultimate Gooey Slime
  • Dry Ice Floating Bubble
  • Goldenrod Paper Message
  • Boo Bubble – Dry Ice Science
  • Black Light – Secret Message
  • Smoking Bubbles
  • Dry Ice Crystal Ball Bubble
  • Gravi-Goo
  • Ghost Marbles
  • Dry Ice Smoke Ring Launcher

So order our DVD Sick Science! Series today. Then come back and share your experiences in the comments below. What worked best for you and what was a #fail?

Decorating Glow in the Dark Magnetic Pumpkins for Halloween

By Blog Editor Susan Wells

I’ve carved pumpkins every Halloween with my children for years. Confession – I really hate it.

1. The pumpkin guts sting my hands.
2. It’s hard to scrape and clean it out.
3. It makes a big gloopy mess without a lot of fun.
4. My girls have a hard time actually carving and I end up doing it. Alone. While they shout from the next room, “are you done yet?”

This year I decided to break with tradition and not carve pumpkins. So I began looking for crafty ideas that included a little science and a void of pumpkin innards.

How to Make Magnetic Glow in the Dark Pumpkins for Halloween | Steve Spangler Science

Look closely to see the dark blue glow in the eyes – the invisible pen creates this effect.

Glow in the Dark Magnetic Jack-o-Lanterns

I ended up adding a Magnetic Paint with a little Zinc Sulfide and a lot of creativity.Halloween Science Activity Guide | Steve Spangler Science


Set-Up Time
- About 10 minutes

Project Time
- About an hour (to allow paint to dry between coats)

Project Location
- Outside or well-ventilated area



Magnetic Pumpkin

  • Lay newspaper or cardboard to protect surface.
  • Wipe dirt or dust off pumpkin so paint will stick. 
  • Cover pumpkin with magnetic paint. This may take several coats to build up the magnetism.
  • Test with a magnet when dry. Add layers of magnetic paint until magnets hold on the sides.

Decorate Glow in the Dark Magnetic Pumpkins for Halloween | Steve Spangler Science

Colored Pumpkins

  • We decided to paint one half of the pumpkin. On the backside, we painted over the magnetic paint with black acrylic chalkboard paint.
  • Before the paint was dry, we lightly sprinkled some glow powder for a special effect.
  • While the paint was drying, we began work on our face…
How to Make Magnetic Glow in the Dark Pumpkins for Halloween | Steve Spangler Science

The blue glowing letters are written in Invisible Pen. They only show up under a Black Light.

Glow in the Dark Pumpkin

  • Draw the face pieces on the contact paper and cut each piece out. Peel the pieces off the paper backing and arrange them as a face for your pumpkin.
  • Once your jack-o-lantern face is complete, take your pumpkin outside and place it on the drop cloth.
  • Spray sections of the pumpkin with the spray adhesive, immediately following with the Glow Powder. For best results, hold the adhesive 10-14 cm (4-6 in) away from the pumpkin and spray a heavy coat. When sprinkling the powder, you may also want to tilt your pumpkin to get it evenly covered.
  • Pour the Glow Powder from its jar into an empty salt shaker. This will make it much easier to sprinkle the powder onto your pumpkin.
    Alternately, you can pour the Glow Powder into an empty portion cup. Cover the top of he portion cup with aluminum foil and hold it in place with a rubber band. Use a thump tack to poke holes in the tin foil… just like a salt shaker!

Decorate Glow in the Dark Magnetic Pumpkins for Halloween | Steve Spangler Science

  • Continue spraying and powdering each section of the pumpkin until the entire pumpkin is completely covered with powder. Carefully shake off any excess powder as you go.
  • Collect the excess Glow Powder and pour it back into the shaker.
  • Repeat steps four and five to ensure that your pumpkin is evenly and completely covered with powder.
  • After the adhesive is completely dry, spray the entire pumpkin with the sealant to make sure that the Glow Powder stays affixed to the pumpkin.
  • After the pumpkin is dry, carefully pull the contact paper off of the pumpkin.

 Decorate Glow in the Dark Magnetic Pumpkins for Halloween | Steve Spangler Science

Final Decorating with Secret Messages

  • Using the Invisible Ink Pen, write a secret message on the non-face side. If you used chalkboard paint, you can also decorate with colored chalk.
  • Using the Magnetic Putty, we changed up the look by adding a uni-brow, a goatee and stringy hair.
  • For the final act, place the pumpkin next to a black light to read your secret messages and see a different side of your jack-0-lantern.

Decorate Glow in the Dark Magnetic Pumpkins for Halloween | Steve Spangler Science

The Science Behind

Learning about the science of things that glow requires an understanding of two important terms – fluorescence and phosphorescence. It’s also important to note that not all zinc sulfide glows, but luminous zinc sulfide does glow!

Fluorescence - This type of luminescence occurs when some form of radiation, such as light, causes an object to glow. For example, fluorescent papers and poster boards glow in the daylight. They may seem to glow even brighter under black light (ultraviolet), but in either case, as soon as the light is removed, the glow stops. Fluorescent things do not glow in the dark all by themselves – they require some other form of energy such as ultraviolet light to “excite” them.

Phosphorescence - Phosphorescence is just like fluorescence, except that the glow continues even after the light used to excite it is removed. “Glow in the dark” toys phosphoresce brightly in total darkness after being “charged” or excited by ordinary white or ultraviolet light.

Glow Powder works by absorbing surrounding light energy and then releasing that energy when the lights go out. It’s called a phosphorescent powder. It’s the perfect way to get your students excited about energy… and a great way to celebrate Halloween! Just add glow powder to almost any of our favorite products and you’ll have an eerie new take on your favorite experiments!

How to Make Magnetic Glow in the Dark Pumpkins for Halloween | Steve Spangler Science

So, how does zinc sulfide work? Imagine that an atom looks something like our solar system. The sun would be the nucleus consisting of positive charges called protons and neutral charges called neutrons. The planets spinning around the sun would be similar to the electrons of an atom in orbits around the nucleus.

When the electrons in the atoms of special molecules like zinc sulfide become excited, they move farther away from the nucleus — into higher or more distant orbits. In order to become excited, the electrons must take on energy. In this case, light provided the required energy to cause the electrons to move to a higher energy level. It’s as if Earth were to move farther away from the sun into the orbit of Mars or Jupiter.

The electrons will remain in the excited state as long as they receive light to energize them. But, when the light used as an exciter is removed, the electrons will slowly return to their original lower orbits. As they do so, they give up the energy that excited them in the form of light.

Thanks to Smashed Peas and Carrots for the original idea.

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