Functional Heart & Circulatory System-This amazing working model of the human heart and circulatory system will bring your lecture to life! A complete schematic model of the human circulatory system with "blood" (colored water) that flows t
Water Rocket: The combination of water, compressed air, and a plastic soda bottle serves as a great source of propulsion for a water rocket. Alternate way (without tape) to fix up those water bottle rockets. by elsa
How to Build a Bottle Rocket. A bottle rocket is fun and easy to make. You can build and launch a simple bottle rocket by recycling materials you might find lying around at home. Roll a piece of paper into a cone.