Add 10 grams (2.5 teaspoons) of salt to 50 millilitres (0.21  c) of water.
Add 10 grams (2.5 teaspoons) of salt to 50 millilitres (0.21  c) of water.
Build a Hydrometer
Build a Plastic Parachute
Build a High Powered Laser
Build an LED Camcorder Light