Step 1: The materials you will need.
one Cardboard box (You will need to cut out three wings.)
At least three empty soda bottles (2 litter size)
One role of plastic drop cloth. This can be found at any local hardware store. I used 0.7 mil size (thickness). I would not go much bigger.
One tennis ball
One spool of nylon twine
Tools you will need:
one pair of good scissors
one 12' inch ruler
One spool of duct tape
One hole puncher
you may also want a drill