Instructions:

• Place an egg in a plastic cup and completely cover with vinegar.
• Place the cup somewhere where it doesn't have to be moved for four days.
• The vinegar will dissolve the eggshell.
• After two days, use a plastic spoon to remove the egg from the cup.
• Lay it down on a paper towel so that it can dry.
• The eggshell will have completely dissolved.
• Take the egg outdoors and from a low height gently bounce it.