Using your Exacto knife, cut a hole through the tennis ball. Take a piece of wire and loop it through the tennis ball so it creates a handle. Then take your parachute and put 8 pieces of masking tape, spread evenly around the edge. Then punch 8 holes, one in each piece of masking tape. Take your fishing line and cut 8 even pieces. Tie one end of the fishing line to a hole in the parachute and the other end to the handle on the tennis ball. Repeat 7 times. Make sure the fishing line is taut when you lift up the tennis ball in the center of the chute.