CG and SA love science experiments. We found this one on You Tube. Every child has to make a bouncy egg at some point. If you have never done this experiment you should try it. The kids think it is so funny. Depending on the age of your children it can be a science lesson as well.
Place the egg in a jar cover with vinegar and let it sit for three days. Have the children observe what is happening inside the jar. After the three days are over take the egg out of the jar and bounce. We also examined the egg with a light.