Okay now that I have a moment...
My physics teacher/team mentor told our whole class the basics of it and I, of course being one of the few awake and excited, took notes
The most expensive part is the metal dome, but my teacher/mentor said that those garden gazing balls work fine.
Just need a motor, some cotton batting (from a craft store), one of those physical therapy rubber bands, some wire to make a comb and connectors, and there ya go!