How long do you leave an egg in vinger to make it bounce?

It takes about 24-48 hours to make an egg bounce by soaking it in vinegar.

Here's why:

* Vinegar dissolves the eggshell: Vinegar is an acid that breaks down the calcium carbonate in the eggshell.

* The membrane remains: The inner membrane of the egg stays intact, creating a bouncy, rubbery ball.

Important Note: The exact time depends on the strength of the vinegar and the size of the egg. You may need to adjust the soaking time accordingly.