The Bouncy Egg Lab · Connected Through Play

Mary Nunaley

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Apr 4 (edited) • Play Ideas & Prompts

The Bouncy Egg Lab

Are you ready? In today’s play prompt we are going to make an egg "bounce" without breaking it.

Gather Your Gear:

One raw egg, a tall glass, and enough white vinegar to cover the egg.

Note: Inspect the egg, you don’t want any cracks.

Get Started:

1. Place the raw egg in the glass and pour vinegar over it until it's completely submerged.

2. Ask your kids if they notice tiny bubbles forming. This usually happens right away. Then you can ask, I wonder what those bubbles are made of? (Hint: It’s Carbon Dioxide!)

3. This is "Long-Game Play." Leave the egg for 24–48 hours.

4. Gently rinse the egg under cool water. The shell will be gone, leaving a translucent, rubbery egg.

The Twist:

The "Glow Test." Take your "naked" egg into a dark room and shine a flashlight through it. You can see the yolk floating inside like a little planet.

Options for Older Kids:

For Ages 12–14: The Osmosis Audit

Once the shell is gone, place the "naked" egg in a glass of corn syrup or very salty water for 24 hours. The egg will "shrivel." Then place it in plain water. It will "plump" back up. Ask: "How does the egg 'decide' to move water in and out?" (This is the foundation of cellular biology!)

For Ages 15–17: The Pressure Point Test

Before the egg "bounces," have them research how much weight a regular eggshell can actually hold if the pressure is distributed evenly. Challenge them to see if they can balance a book on four upright eggs. Discuss how "structure" changes everything.

Your Turn

Did your egg survive the "Bouncy Test"? How many bubbles did you see in the first 5 minutes?

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