How to Make a helicopter powered by rubber bands

This is a great little rainy day project you can make for almost no money, or a fun party trick you can use at the next office Christmas party! You will need two disposable drinking cups (stiff plastic or paper will work best), a fairly thick straw, a sturdy paper clip, a thick rubber band, a cocktail stick, a bead and a plastic ring you can get from the neck of a soda bottle. Assemble as shown, and then let it go!