This is the easiest to make, follow the directions and you can't go wrong.

• 1 rusty hinge
• 1 small board
• 1 small spring

1. Attach one end of the spring to one side of the hinge.
2. Attach other end of spring to one end of the board.
3. Finally put other side of the hinge on the other end of board.
4. You're done!