Anemometer

this is how you make an anemometer

punch 4 holes in your cup opposite each other just under the rim

insert a straw through holes opposite facing.Insert another straw, making sure the straw is on top of it.

punch two holes at halfway in four cups

stick your straw in the two holes

turn the cups upside and stab the pencil through the bottom

Stab the pin through, where the two straws cross and then into the rubber of the pencil (not to hard )