Warning: These experiments generally require adult supervision.Finding Your Way
If you were lost in the woods, would you be able to determine which way was north?
Heating a Balloon
Can you hold a balloon in a candle flame without popping it? You can if you know the right science.
Use the science of Topology to make an object with only one side and only one edge. This experiment is one of my favorites.
Use steam and air pressure to crush a can in a fraction of a second.