Can you make an egg bounce? 5th grade B

Few months ago, Alí showed us an experiment. To do it you need one boiled egg, vinegar and a large bowl. The steps are:

1. Place the boiled egg in the bowl.

2. Completely cover the boiled egg with vinegar.

3. After three days, remove the egg from the jar. 

4. Gently rinse the shell of the egg with tap water.

Then, try bouncing the egg on a hard surface. 

http://www.planet-science.com/categories/experiments/messy/2011/02/can-you-make-an-egg-bounce.aspx