Concept 1: Empty Bottle Rocket
Basic Principal: Propulsion Using Forced Air
How It Works: The jet fits over the top of an empty soda bottle or milk container. When the bottle is compressed
with a sharp blow, the jet flies off.
Ages: 6 and up
Materials: Plastic, Lightweight Styrofoam or foam of some sort
Durability: Very durable-No moving parts
Bottle can be replaced
Safety: Large enough not to be a choking hazard
Soft enough not to hurt if the jet hits a bystander
Construction Cost: Very Cheap