Rebecca took a chicken egg, and soaked it in white distilled vinegar for 2 days.
At the end of 2 days, she checked it. The shell was completely gone, and the egg was rather rubbery. If you hold it up to the light, you can see the yolk and the inside of the egg.
Kind of a neat homeschool science experiment that anyone of any age can do. This would make a good experiment for younger ones for a science fair, such as the one in St Joseph MO every February for homeschoolers. Soak the egg in other liquids and see if any other liquids can have the same effect. We always here how bad soda pop is on our teeth, I wonder what would happen to the shell if an egg were soaked in soda pop?