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Heartbleed Security Vulnerability Fixed   •   Get 2 Free Sick Science! Kits   •   Free Experiments by Email

On Monday we learned about a vulnerability in the encryption technology that effects most of the internet, called Heartbleed. Our team grabbed their lab coats and leaped into action to patch the vulnerability on our site.

We are happy to announce is no longer vulnerable.

While we believe we have kept out all the bad guys, we want to make sure our customer's information is safe. We are requiring that all of our customers change their password for their accounts on

To do so, click the link below and enter in the email address associated with your account. Once you receive an email to that account, follow the simple instructions to reset your password.

Reset your password -

If you have any questions on password resetting, please call our Customer Service team and they will be happy to help you. 1-800-223-9080

If you have any questions about the vulnerability please email

As this did effect most of the internet, we also recommend that you change your passwords on all of the websites you visit.

Thank you for being an amazing customer!

-- The Team

Questions? Give us a Call: 1-800-223-9080

Bubbling Density Concoction

The bubbling concoction is a clever mixture of lessons.

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This experiment was featured on KUSA-TV in May of 2005 andpresented by a group of young scientists from Burlington Elementaryin Colorado. The bubbling concoction is a clever mixture of lessonsin density and chemistry.

  • Clear plastic cups
  • Light corn syrup
  • Red and blue food coloring
  • Mixing spoon
  • Baking soda
  • Small measuring spoon
  • Water
  • Vegetable oil
  • Disposable cup
  • Vinegar
  • Dropper or pipette
Print Experiment


(Be sure to cover your work area before beginning this experiment!)

  1. Pour corn syrup into a plastic cup to a depth of about 1 inch (2.5 cm). Mix in several drops of red food coloring and mix well.
  2. Sprinkle small measuring spoonfuls of baking soda on top of the corn syrup to a depth of about 1/4 inch (3/4 cm).
  3. Gently pour water into the cup to a depth of about 1 inch (2.5 cm).
  4. Add the vegetable oil next to a depth of about 1 inch (2.5 cm).
  5. In a separate cup, use the blue food coloring to dye the vinegar.
  6. Take the dropper and drip the vinegar into the first cup. You will notice that blue blobs will slowly add up between the oil and water. Keep adding the vinegar and watch the results.
  7. Next, take the dropper filled with vinegar and put it down into the cup so that the tip is in the baking soda layer. Release the vinegar and see what happens.
  8. Keep adding more vinegar and observe the foaming reaction.

How Does It Work?

This experiment shows density along with a chemical reaction. Notice that the lighter liquids float on top of the heavier ones which creates the separation in the glass. When you first add the vinegar, it drops through the oil but has trouble breaking through to the layer of water. Because of that, blobs of vinegar pile up at the bottom of the oil layer. When the vinegar is released in the layer of baking soda, a chemical reaction occurs that causes it to foam.

Customer Reviews

Great Experiment! Review by Elana

It worked great! My kid loved it.

(Posted on July 23, 2012)

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