ideas for throwing the best halloween party

Halloween Party Science Activities & Ideas

Release your inner mad scientist to create the best Halloween party ever!

Halloween Party Activities and Halloween Science Experiment Ideas 

Give ‘em pumpkin to talk about with our Halloween science activity ideas and activities. Release your inner mad scientist to create the best Halloween science-themed party ever!

Looking for some great children’s Halloween party activities? Dying to have fun and want some great Halloween science party ideas? It’s Steve Spangler Science to the rescue with some DIY Halloween party ideas and info to make it a party to remember! 

We’ve got the best recipes, Halloween science activities and step-by-step instructions so you can “creep” it real this Halloween season. How about mixing up a batch of gross slime or a bubbling dry ice potion? Want a “fang”-tastic, spooky party with some creepy atmospheric lighting and some glow-in-the dark fun? Turn off the lights and watch our Atomic Slime and Atomic Slime glowing worms glow. Or, write your very own hidden messages and make scary Halloween sounds.

Yep, Halloween is the perfect time for oozing, bubbling and slimy mixtures. It’s also the perfect opportunity to have some Halloween science activity party fun. This is the place to be for great DIY Halloween info, as well as children’s party ideas and Halloween science experiments for elementary students. Whether you’re at home or in school, “Spook”-tober is a great month to learn and to have a blast with these memorable Steve Spangler Science experiments. We have all the Halloween party supplies and info you will need to have the best party on the block. Halloween is a wonderful excuse to fill that cooler with dry ice and to get ready for a day filled with “ooze” and ahhhs. This Halloween is gonna be great — we can feel it in our bones! 

Experiment Materials


Dry Ice Activities


How to Use Dry Ice – Fun Science Ideas

Halloween is the perfect time for oozing, bubbling and eye-catching science. If you love to perform science demonstrations, Halloween is a wonderful excuse to fill that cooler with dry ice and get ready for a fun-filled day filled with “ooze” and ahhhs! Check out our dry ice demonstrations and instructions to create a spook-tacular Halloween.

Check out our dry ice instructions and experiments here.

Boo Bubbles


How to  Make Boo Bubbles – Fog Bursting Bubbles

Bubbles are cool, but bubbles filled with smoke are even cooler! Just imagine the skyrocketing cool factor when you can bounce and play with these bubbles, too. Steve Spangler Science’s famous Boo Bubbles are what you get when you fill a bubble with a carbon dioxide cloud using a cloud bubble generator (that we’ll show you how to make). We saved the best for last: you’ll also learn how to roll and bounce the bubbles in your hands. Whoa! It’s the combination of science AND performance art.

Check out the Boo Bubbles how-to instructions and experiment here.



The Famous Exploding Pumpkin Experiment and Instructions 

Just consider it a new way to carve a pumpkin at Halloween. In this Halloween science activity, your pumpkin is carved in the traditional way. However, this Halloween science activity has a twist: a chemical reaction is triggered inside the pumpkin and those previously carved pieces are literally blown out of the pumpkin. Boo-yah!

Check out our Exploding Pumpkin experiment here!


The Spookiest Halloween Drink Ever

Adding some dry ice is the best way to create a wicked awesome carbonated punch for your next Halloween party. The next time you have a craving for a sparkling, homemade and carbonated beverage, make your own simply by drawing upon what you already know about dry ice. This science party idea is also a great learning experience about chemical reactions.

Check out our Spooky Halloween Drink science activity here! 


Oozing Pumpkins

Have a “gourd” time on Halloween with our Oozing Pumpkin Halloween science activity that is guaranteed to get them talking. This is an awesome new Halloween twist on our Kid-Friendly Elephant’s Toothpaste experiment. In this Halloween-themed application, you’ll have some awesome foaming ooze seeping from the face of your jack-o’-lantern — as well as squeals of excitement coming from the faces of your audience.

Check out our Oozing Pumpkin Halloween science party idea here!


Fake Blood


Fake Blood Recipes

Science Halloween experiments and parties just wouldn’t be the same without a few gallons of fake blood. There are tons of fake blood recipes floating around, but the biggest complaint is that the fake blood looks nothing like real blood. Here is a Halloween party activity that is guaranteed to make realistic-looking fake blood. However, any good scientist knows that it takes a bit of experimentation to create something that’s just your (blood) type!

Check out our Fake Blood Science Experiment and how-to instructions here.

Halloween Decorating Kit


Halloween Decorating Kit

Most of the Halloween fun comes from decorating your house, classroom (or yourself!) in costumes. Take Halloween decorating to a super-science level with our Halloween Decorating kit for the best DIY Halloween party ever. Using our hands-on science favorites like Jelly Marbles and Water Jelly Crystals, it’s easy to set up your own mad scientist laboratory that’s filled with bubbling test tube potions, graduated cylinders filled with glowing liquids, ghost eggs and more.

Check out our Halloween Decorating Kit for some great science party ideas!

Ghost Science Kit


Vanishing Ghost Poop

Ghost poop? EW! But if it’s for science, we’ll give it a try. When you experience how quickly ghost poop vanishes in plain ol’ water, you won’t be surprised that people can’t see these ghastly goodies. If you really want to play and experiment with it, we’ve gathered a whole bunch of spooky dookie, just for you! Try out the Ghost Science Kit from Steve Spangler Science.

Check out our Ghost Science Kit here! 

Slime Glow in the Dark


Halloween Slime
You’ll be mummy of the year with this Halloween Slime activity. Whether you’re looking to gross out people with slime you can eat, wanting some great Vampire Slime how-tos or you’re looking for a glowing ooze for an alien-themed Halloween, we’ve got you covered. Some sort of slimy, oozing substance at your Halloween party is a must-have. We’ll give you step-by-step instructions on how to make this easy-to-mix slime that’s fun for all. It’s the best around!

Click here for our famous Vampire Slime recipe!


Glow in the dark activities


Make It Glow!

Halloween is all about spooky, creepy things that lurk in the dark. There’s nothing better than turning off the lights and bringing out glowing, mysterious and slimy materials to touch and watch. The kids will ooh and ahh! Whether you are planning a Halloween party, looking for unique decorations or just wanting to have some fun with your own kids at home, here are some glowing activities you can perform.

Check out our Glow Powder here! 


Glowing Pumpkins

If you’re a fan of Spangler Science, you know that we love our Exploding Pumpkin experiment. We’ve also found that glowing pumpkins can be just as fun! Just add our Glow Powder to your Halloween pumpkins and you’ll get a spooky Halloween display — without all the mess of carving.

Check out our Glowing Pumpkins Science Experiment here! 

Vampire Science Kit


Vampire Slime Kit

Our vampire science lesson features a new color-changing recipe that contains a special, light-sensitive ingredient. Turn our famous gooey slime and vampire veins from an eerie green to blood red as you reveal a vampire’s favorite snack. The secret? It’s a special dye that looks green under normal light and glows an eerie color under black light. It then turns blood red when you hold it up to ordinary white light. Wow!

You’ll receive all the supplies needed to make 24 shaker cups filled with Vampire Slime. It’s the most original take-home party favor you’ve ever seen. You’ll also learn how to make color-changing vampire veins that are guaranteed to make your guests scream with delight. Finally, you’ll learn how to capture a spooky, glowing image on a piece of phosphorescent paper using a battery-powered black light wand.

Check out our Vampire Slime Kit here!


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Remember these safety rules when using dry ice:

  • Dry ice is not a toy. It is for demonstration purposes only
  • Only use dry ice with adult supervision
  • Always wear safety glasses when handling dry ice. The debris is extremely dangerous to your eyes
  • Dry ice must be handled using gloves or tongs because it will cause severe burns if it comes in contact with your skin
  • Never put dry ice in your mouth
  • Never store dry ice in an airtight container. As the dry ice turns from a solid directly into a gas, the gas will build up and the container will explode. Make sure your container (a Styrofoam chest works well) is ventilated or has a loose-fitting lid
  • Do not store dry ice in a freezer. It will cause your freezer to become too cold and your freezer may shut off. On the other hand, if you lose power for an extended period of time, dry ice is the best way to keep things cold
  • In the unlikely event of a dry ice burn, treat it the same as you would a heat burn. See the doctor if the skin blisters or comes off. Apply antibiotic ointment to prevent infection and bandage mild burns

Where to Purchase Dry Ice

Some grocery stores will sell dry ice to the public (especially around Halloween) for approximately $1.50 per pound. Dry ice is typically sold as flat, square slabs a few inches thick, or as cylinders that are about three inches long and about a half an inch thick. Either size will work fine for your dry ice experiments.

Remember the science when purchasing dry ice: dry ice turns from a solid into a gas in a process called sublimation. In other words, the dry ice in a grocery bag will literally vanish in about a day. The experts tell us that dry ice will sublimate at a rate of five to 10 pounds every 24 hours in a typical Styrofoam chest. Again, it’s best to purchase the dry ice as close to the time you need it as possible. This is the one time when last minute shopping is necessary. If you are planning to perform several dry ice demonstrations, purchase five to 10 pounds.

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