This is very simple, all you have to do is crack the top of the egg a little and peel the shell off, then wash the inside of the egg with warm water.
Next fill the egg with some kool-aid and baking soda. Then add the vinegar and you have your egg volcano.
To hold the eggs we used our egg carton cut in half.
After you are done you can wash the eggs out and can reuse it for the kids to do it again later.
Be sure to check back cause we have one last egg experiment and you don't want to miss this one. Below are a couple other fun Easter science experiments we did.