Pencil-Copter

Turn any ordinary pencil into a helicopter! Just spin it in your hands and liftoff!
Finally, a use for all of those old, eraser-less pencils!
This is seriously fun to play with, trust me.

Glue may be necessary after the pencil gets worn-out a bit.
Use caution, and common sense. The blades will hurt if they hit you!

I designed this propeller with a little bit of extra weight at the blade tips, to increase the moment of inertia. That way it won't slow down so quickly, because it has more