this will egg-splain (pardon the pun) to you how to easily make a bouncy egg using... an egg!
this is very simple and easy to do!
A friend showed me how to do this so I'm doing this on his behalf.
Step 1: Preparing the Egg
Leave it, you need to do nothing to the egg at this point.
Step 2: Preparing the Equipment.
Get a glass bowl that can fit the egg in it and still have room around it.
Now, plac the egg into the bowl
Submerge the egg in vinegar, completly covering the whole egg.
Step 3: What Happens?
you will see that the egg has no shell but is in a ball shape, what has happened is that the vinegar has disolved the egg shell but has kept the tension in the egg.
you can add colour to it by putting the egg in honey, then in food colouring of any colour, making the egg change colour.
Step 4: WARNING!
do not bounce the egg from to high or it will splat all over the floor... very messy!