NERVE TESTER

Key idea: An electric circuit is a complete (unbroken) path that forms a loop.

You will need:
• a coathanger (or thinner but stiff wire), bent into a crazy wave shape and
  fastened into a wooden board
• a buzzer
• a battery
• connecting wire.

Procedure:

1. Construct a circuit, designed so that a player’s nerve is tested as they attempt to pass a loop along this wire without touching.
2. A buzzer rings if the loop touches the wire.
3. The circuit is completed when the loop touches the wire.
4. The game becomes more difficult if the loop is made smaller.