How to Make Bottle Rockets Out of Plastic Bottles
- 1). Cut some rocket fins out of cardboard and attach them to the cap end of the bottle so it looks like the rocket is upside down. These are not necessary, but they will make it look more like a real bottle rocket.
- 2). Remove the paper wrapping from a packet of soft mints, but leave the foil wrapping on the packet.
- 3). Drop the sweet packet into the full bottle of soda and replace the cap.
- 4). Shake the bottle vigorously for a few seconds.
- 5). Loosen the cap slightly until you here a fizzing sound. Hit the cap of the bottle on the ground and stand back.
- 6). Watch the rocket fly into the air as the release of pressure uses the soda as a jet stream to propel it into the air.
Source...