Eggs and kids, what could be messier? I guess when you are going down that road of science with kids it is sometimes necessary to get dirty.
I found this one on a web site called familieswithpurpose.com.
So here we go! You will need a hard boiled egg without its shell, a glass bottle with its mouth a little smaller then the egg, matches, and a small piece of paper.
First, drop the paper into the bottle, followed by the lit match. Then place the egg on top of the bottle. The egg should drop inside. To get the egg out turn the bottle over so that the egg covers the opening, then blow into the bottle. The egg should fall out.
Why does the egg fall into the bottle? The web site explains it this way “The egg prevents outside air (high pressure) from getting into the bottle while the flame causes the air inside the bottle (low pressure) to contract causing a small vacuum.
As the outer air pushes its way into the bottle and the vacuum is created in the bottle, the egg falls in.”
Why does the egg fall out? They state that “The air pressure in the bottle forces the egg out and into your hand.”
The egg might even still be edible after the experiment.
Would you try this one?