The Bouncy Egg

Have you heard of the bouncy egg experiment? It’s all the rage in my third grader’s class.

It’s hard to believe that #bouncyegg isn’t trending yet, but if you aren’t familiar with the experiment, it helps you turn a regular (raw) egg into, well, a bouncy egg. The result: an egg that feels rubbery (like a bouncy ball) and actually bounces!

We had so much fun doing this. (Thank you, Mrs. Lee!) My third grader was very excited to observe the egg’s progress each day and was SO excited when the bouncy egg was finally revealed. The first few bounces were euphoric. We thought we had a little more time with our egg… but, alas, it went SPLAT. (Good thing I have five seconds of fun on video! ? )

This experiment is fun for all ages, and it’s a super easy weekend activity. Plus, you can do multiple eggs at one time if you use individual jars or glasses for each egg. 

Supplies Needed:

  • 1 raw egg
  • 1 tall glass or jar
  • White vinegar (orange juice will suffice if you do not have vinegar)
  • Optional: food dye (we did not do this, but we will next time!)

Step by Step Guide: 

  1. Carefully place a raw egg into a tall glass or jar.
  2. Fill the glass with white vinegar until the egg is completely submerged.
  3. Leave the egg in the glass for 1-3 days. Each day, check on the egg. When the egg has started to become translucent, you’ll know it’s ready.
  4. Remove the egg from the glass, and rinse it under tap water. While rinsing the egg, gently rub the outside of the egg. This will remove the white film, leaving you with a translucent egg.
  5. Examine the egg. You’ll notice that it feels rubbery (like a bouncy ball). Lift the egg 1-2 inches in the air, let go, and watch it bounce! (Pro tip: Make sure it’s on a solid, smooth surface!)
  6. Ready for some messy fun? Lift the egg a little higher in the air and let it go… SPLAT!

Daily activities as you check on your egg(s):

  • Questions to ask your kids:
    • Are there bubbles? 
    • What does the shell look like? How is it changing?
    • Is the egg getting bigger? Smaller? 
    • Is the egg sinking? Floating?
  • Make daily sketches of the egg, using colored pencils, markers, crayons, etc. Do you notice any changes? 

The Science Behind the Experiment:

The shell of an egg is made of calcium carbonate. When you place the egg into the vinegar, the bubbles you see are the chemical reaction of the acid in the vinegar reacting with the calcium carbonate, which produces carbon dioxide. You’ll also notice that the egg gets larger as it sits in the vinegar; this is because some of the vinegar is absorbed in the egg through its semi-permeable membrane.

Happy bouncing! 

Alexis ?

P.S. If you’re looking for other science-like activities, check out our Science category

 

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About Alexis

I'm a mom of two girls, ages 9 and 12. My daughters love to learn - math, science, reading and coding are their favorite things. Trying to navigate this "new normal" of parenting in a virtual world ... just like everyone else!

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