Materials:

  • Large juice can (V-8 can works well)
  • Twelve inch wooden ruler
  • Duct tape
  • 4"x5" index card
  • Coin (a quarter works well) or large steel washer
Procedure:

  • Construct the device pictured below by duct taping the ruler to the side of the large can and placing a coin or washer on an index card on top of the can.
  • With the following limitations, get the coin/washer into the can without touching the coin/washer or the card.
The limitations are:

  • The can cannot be moved.
  • Wind or moving air cannot be used.
Juice can with ruler and quarter.