I'm taking a step back from the electronics and reliving my earlier years with an instructable on match rockets. I did not create these, i'm just sharing the idea. These provided hours of fun for me and my friends. Best of all, they are simple, and practically free to build. But as is obvious from the title, these use matches and are rockets, so they do deal in fire. Because of this, a precautionary statement is needed:
WARNING: Match rockets involve fire, and because of that, adult superviosion is required when young children are using the rockets. Always use common sense, and be safe when playing with fire. Always assemble and lauch the match rockets outdoors.
Step 1: Materials
With that out of the way, lets get to it. The first step is to obtain the materials. You will need:
Sheet of aluminum foil (Any size will do)
Box of kitcen matches (Large matches with the wooden sticks work the best)
Piece of wire (about 3 inches in length. You want something thin but rigid. A straightened paperclip works)
Optional: Gas grill lighter