PVC glue

Make: Compressed Air Rockets Kit

Make: Compressed Air Rockets Kit

Building this rocket launcher is a breeze, and folks are always amazed at how it shoots reusable paper rockets 200โ€“300 feet high. The launcher is made from PVC pipe. You pressurize its chamber to 75psi with about 18 strokes of a bicycle pump, then release all the pressure in a split second through an electric […]

Jellyfish Tank

Jellyfish Tank

A tank of healthy jellyfish is hypnotically beautiful. Unfortunately, jellies canโ€™t live in a regular aquarium because they get sucked into the filtration pumps or trapped in โ€œdead spotsโ€ at the edges. This special design creates a laminar flow that keeps jellies safely suspended in the middle of the tank.