In this video I show how to make a super simple propane bottle launcher, especially good for demonstrations of the basic physics of rocketry. I've used this launcher myself for kid's science lessons ...

Making a hole through the cork using a drill ... Oh, and an apple may have fallen on his head. The water bottle rocket demonstrates two of his laws. Every action has an equal and opposite reaction.

The staggered tongues that are left after cutting along this line make up the friction ... is then slipped over another bottle that makes up the body of the rocket. The rubber band wraps around ...

This bottle rocket runs on ethanol, ejecting the hot products of ethanol combustion. It is fairly loud and moves very quickly. This will get everyone's attention. Make sure the launcher platform is ...