Bottle Rocket Launching
| Min number of participants | 1 |
| Age | 6+ yrs. |
| Min duration | 1 h |
| Cost | None (Free) |
| Environment | Outdoor |
Building a rocket from a plastic bottle, fins, and a nose cone, then pressurizing it with water and air or a vinegar-and-baking-soda reaction to launch it skyward — a backyard physics experiment that ends with a genuine countdown and liftoff.