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 Make a Cardboard Box Marble Labyrinth Game - Frugal Fun For Boys Engineering STEM activity for kids - Build a cardboard box marble labyrinth! Get the marble through the course without it dropping into the holes.