This spring-loaded air gun design would demonstrate the stored potential energy of a spring, force exerted by pressure of the gasses escaping the chamber, and projectile motion of the dart as it flies through the air.

The gun would be loaded by pulling back on the plunger which would draw air into the chamber via valves (not drawn). The plunger would be attatched to a fairly stiff spring which would resist the loading. The plunger would catch on a trigger. Once the trigger was pressed the plunger would be released and the spring would pull it forward quickly, evacuating air in the chamber in the process and propelling the suction dart out of the end of the gun.

The gun would be made of clear plastic so that children could see how the gun works. The safe suction darts can be fired at anything from the television monitor to other children. For this reason it is also intended for children 10 years and older. The darts may be dangerous to younger children.

Production costs should be pretty low since the gun is made primarily of plastic and there are few moving parts which should also translate to durability.