Have you ever seen a bouncy egg? Not often, right? Whether your kids are big science fans, or not, you should definitely try out this simple and fun experiment with them. I’m pretty sure they’ll be impressed. My boys (and the rest of the family I might add) really got a kick out of it and it’s so easy! It barely takes up any of your time. Chances are you already have the 3 items required in your kitchen.
It’s fascinating to watch a raw egg transform into a bouncy object, resembling the consistency and texture of that of a water balloon. Here’s a super quick video of what you can expect your egg to do when it’s done:
*We used a raw egg for our experiment. You can also use a hard-boiled egg as well but it may take longer. Using a raw egg only takes one day.
Put the egg into the glass cup and cover the egg completely with vinegar:
And wait…You’ll see the egg starting to form bubbles on the shell. This just means the vinegar is hard at work.
And wait some more…Keep the egg in the vinegar for an entire day. We started our experiment on Friday night at 7:00 p.m. and it was done by Saturday night at 7:00 p.m.
You’ll want to occasionally move the glass around while you’re waiting to ensure the egg stays completely drenched in the vinegar. You don’t want any part of the egg not covered.
When a full day has passed, touch the egg to see if it feels squishy. If so, it’s ready. Take it out of the vinegar and rinse it off. Here’s what ours looked like when done:
We used a brown egg. A white egg may turn out differently. You can also add dye to the vinegar if you’d like a colored squishy ball.
It’s so cool because the egg feels like a water balloon and it actually bounces. If you use a raw egg, I wouldn’t bounce it too hard. If you use a hard-boiled egg, I assume it will be a bit more stronger. We bounced our egg quite a bit without it bursting. It’s really an impressive experiment!
If you’re going to do this experiment, you definitely want to be able to explain to the kids why and how it happens. It makes it all that much more fun.
Vinegar is an acid (acetic acid) and eggshell is made of calcium carbonate, which reacts when exposed to an acid. The eggshell dissolves over time from its exposure to the acid (vinegar), but leaving the membrane inside the shell intact. This is what makes the egg feel squishy, rubbery and bouncy when the experiment is complete.