1. Funnel
  2. Tea kettle
  3. Hard-boiled egg (peeled)
  4. Oven mitt
  5. Water
  6. Empty, clean, glass bottle similar to an old milk bottle or a salad dressing bottle. The egg needs to be able to rest on the mouth of the bottle
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1. To start, boil water in a tea kettle.
2. Once boiling, use an oven mitt to hold the teakettle. Place the funnel over the mouth of the bottle, and pour the water from the teakettle into the bottle.
3. Parents, please keep an eye on the children if they are handling these hot materials. Otherwise, it is best if you do it for them.

How to Play: 

1. Remove the funnel and swish the water around in the bottle.
2. Pour the water out and quickly place the egg over the mouth of the bottle. Look what happens!

Activity Length: 
5 minutes or less

There is a lot of science going on here! The egg is sucked into the bottle due to the contraction of air pressure. First, the air in the bottle expands because it is warmed from the heated water. However once it starts to cool when the water is removed, it starts to contract. This contraction causes the egg to be sucked in! The opposite is true when the egg comes out. As you blow in the bottle the air pressure increases, expanding the air and thus forcing the egg out!

Attention, please! (a few rules to follow)
Mess Factor: 
Dustpan, please
Noise Level: 
Number of Players: 
10 to 20
Prep Time: 
10 - 20 minutes
Space Needed: 
Small (a clearable open space the size of a 1-car garage)
Team Division: 
Every man for himself (individual players)