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Rubber Egg

What You Need

Hard-boiled egg
Clean, empty glass jar and lid
White vinegar

What to Do
Place the egg in the jar. Cover with vinegar. Secure the lid and let the jar stand for one week.
What Happens
The eggshell dissolves and you are left with a rubbery egg that will actually bounce if not dropped from too great a height.

Why It Works
The vinegar (acetic acid) dissolves the calcium carbonate in the eggshell.

Bizarre Facts

English author Samuel Butler wrote: "A hen is only an egg's way of making another egg."
As many as nine yolks have been found in hen's eggs.
On February 2, 1990, at the International Poultry Show in Atlanta, Georgia, Howard Helmer made 427 two-egg omelettes in a half hour, setting a world record.
On April 9, 1992, the staff of Cadbury Red Tulip in Ringwood, Australia, completed the heaviest and tallest Easter egg on record, weighing 10,482 pounds 14 ounces and reaching a height of 23 feet 3 inches.
The working title of the Beatles' song "Yesterday" was "Scrambled Eggs."
The average ostrich egg, approximately twenty-four times the size of a hen's egg, can support the weight of a 280-pound human.
The vervain hummingbird of Jamaica lays the smallest bird egg in the world, weighing less than 0.0132 ounce.
Holy Egg Shells!
On the 1960s television show Batman, the arch-criminal Egghead, played by Vincent Price, was considered the smartest villain in the world, hatched fiendish schemes, and had an eggs-cellent vocabulary, including words like eggs-traordinary, eggs-citing, and eggs-hilirating.
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