Rubber Egg

• The popular "rubber egg" experiment demonstrates how egg shells, which are made of calcium carbonate, respond to acid. To carry out this experiment, place a few eggs in a plastic container or a jar. Cover the eggs with white vinegar and place a lid on the container. Refrigerate the container for 24 hours. When you check on the eggs the next day, you'll notice that the eggshell has become softer, if not completely dissolved. If there is still some shell left, put them in vinegar for one more day: Carefully remove the eggs, pour out the old vinegar, replace the eggs and cover them with fresh vinegar. Refrigerate the container of eggs another 24 hours. When you check on the eggs again, the eggshells will be gone, leaving only a translucent membrane to contain the egg's contents. Squeeze the eggs to feel how rubbery they are, but don't squeeze too hard or they may rupture.
  
  

Diffusion and Osmosis in Animal Cells

• This experiment demonstrates how solutions pass through a cell membrane. To do this experiment, make a salt solution (1 part salt to 10 parts water) and a sugar solution (1 part sugar or corn syrup to 10 parts water). Measure each egg and track their measurements. Place one egg in a jar and cover it with the sugar mixture, place a second egg in another jar and cover it with a salt solution and place a third, "control" egg in a third jar and cover it with distilled water. Place lids on your jars, mark them and store them in a refrigerator for a day or two. After 24 or 48 hours, pour the liquid off of the eggs and measure them to see if the solutions had any effect on the eggs' sizes.
  
  

Egg in a Bottle

• In this dramatic presentation, you will get a hard-boiled egg to slide through the mouth of a bottle. You will need a glass bottle with a mouth a little bit smaller than your egg, a 3 by 3 piece of newspaper and a match. Remove the egg shell, and place the egg over the mouth of the bottle to show that it doesn't fit. Fold the newspaper and ignite it with a lit match. Take the egg off of the mouth of the bottle, drop your newspaper in and replace the egg. It will slide into the mouth of the bottle.
  
  

Flying Pizza Pan Egg Drop

• This experiment demonstrates how force affects the motion of objects, and how the shape of objects affects their movement. You will need a pizza pan, four toilet paper tubes, four eggs, four cups and a traditional broom. Lay the broom on the ground, place a foot on the straw under the stitching, and lift the broom handle with your hands. Let go of the handle to show how it falls. Arrange the cups in a square formation on a table or counter, and balance the pizza pan on top of the cups. Step on the broom again, and hold the handle so it will hit the side of the pan when you release it. Replace the cups and pan, and stand your paper tubes on top of the pan in a square formation. Repeat the action with the broom. Finally, set up your cups, tin and tubes again and balance an egg on each of the tubes. Repeat what you did with the broom and see what happens. You can clean up the eggs with warm, soapy water.