Disappearing egg shells!

For science week, we tried to get the egg out of the shell without breaking it. Can it be done? Of course it can, if you use a little science. We put an egg in a clear glass and covered it with vinegar. First we saw some bubbles forming. Then some froth was visible in the jar. After a few days there was no shell left on the egg. We put on some gloves and felt the egg. It was very spongey. For extra fun, we decided to leave the egg in the vinegar to see what would happen. The egg got very big! We took it out and tried to bounce it. It didn't break on the first try but guess what happened on the second? Yes, that's right......SPLAT!