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How to Make a Catapult out of a Cardboard Box

The familiar cardboard box can transport a youngster to ancient times when the box is transformed into a catapult worthy of the toughest Knight of the Round Table. This project teaches basic engineering techniques while providing imaginative playtime. It's a great rainy day activity, and can be incorporated into a knight-themed birthday party craft session. The catapulted marshmallows will do little damage to the party locale, and the extras provide a sweet party treat.

Things You'll Need

Cardboard box
Pencil
Rubber band
Awl
Plastic spoon
Masking tape
Scissors
Marshmallows

Instructions

- 1
  Cut one piece of cardboard from the box to measure 1 foot square for the catapult base.
- 2
  Cut the other piece of cardboard to measure 4 inches by 1 foot for the lever. Fold the lever in half lengthwise.
- 3
  Poke a hole in the center of each side of the lever with the awl. Poke a hole in the middle of the base.
- 4
  Cut the rubber band and make a knot in one end.
- 5
  Pull the rubber bank up through the base and both holes of the lever, with the knotted rubber band end on the bottom of the base.
- 6
  Tape one side of the lever to the base. Make a tight knot in the other end of the cut rubber band.
- 7
  Tape the spoon handle to the top of the folded lever, with the bowl of the spoon facing down and extending past the unfolded edge of the lever.
- 8
  Pull the spoon back, place the marshmallow in the bowl and catapult the marshmallow forward.

Construction Toys