first you will need the motor of a fan.( the crappy ones you get at the 99 cents store are perfect)second you will need a sheet of metal.( a soda can is good)a nine volt batterytoolsyou will need scisorsand you will need safety equipment. this is very sharp and can cut you!
Step 1: Makig the Sheet
to make the metal sheet, take the soda can and cut it so it wil lay as a flat sheet. then cut it so it is about one inch by one inch. to get the hole through it just take scissors and poke a very very small hole.
Step 2: Connection
i personally lost the wires for the motor so i just stuck it on and off of the 9 volt. first you put the sheet of metal on the pole for the motor. then you connect the wires (i didnt but whatever) and it will turn on. WARNING DO NOT ATTEMPT TO TOUCH THE METAL AS IT SPINS!!! IT WILL CUT YOU DEEPLY!!!I AM NOT REPSONIBLE IF YOU GET INJURED!!!