Science Experiment – Rubber Egg Experiment

May 9, 2023

Spring is known as a time for change, can you and your young inventor note all the different changes going on outside right now?

This experiment is sure to bring the wow factor and inspire intrigue and curiosity. This experiment dives deeper into the science side of STEAM.

Question: What will happen when you place eggs in vinegar and food coloring for 2-3 days?


Hypothesis: If eggs are in vinegar and food coloring for 2-3 days then

*Make sure to ask your #younginventor his hypothesis before moving onto the next step.


      • Eggs
      • Vinegar
      • Food Coloring
      • Jars


    1. Fill you mason jars halfway with vinegar.
    2. Add 10 drops of food coloring to each jar (pick your favorite or make them all!).
    3. Carefully place one raw egg inside of each jar and let it sit for 2-3 days.
    4. When the surface of the water has a film – the eggs are ready to come out.
    5. Remove the egg from them jars and rinse them with water.
    6. Carefully play with your rubber egg!

Let’s make some conclusions! Ask your child:

      • Is this what you expected to happen?
      • Was your hypothesis correct?
      • What happens if you gently roll or bounce the egg?
      • What color is the egg yolk if you break them open? Does this surprise you?
      • Will shells dissolve in different materials?

What Is Happening?

This experiment shows kids osmosis in action! Osmosis is how a liquid moves through a membrane. The addition of the dye to this experiment shows how osmosis works. But wait there’s more! This experiment is a lesson in chemical reactions and dissolving. Vinegar is able to eat through the calcium shell but it is not powerful enough to dissolve the egg’s membrane. This is how it retains the rubbery effect. The egg membrane is semi-permeable which means that the liquid vinegar will pass through it into the egg (making it change color).

So why doesn’t the yolk change color? The high protein content of the yolk prevents the egg’s cells from absorbing the colored liquid.


Did you know we have a club designed for children ages 4-12 so they can learn the importance of inventions from an early age? As a member of the club, you and your children will learn all about inventions while completing fun, easy STEAM activities. We hope to spark the creativity of every #younginventor!