hobby or other uses for ceiling fan motors?

[greybeard]

I have several functional ceiling fan motors--anyone know of any good or interesting uses for them?
Hate to throw them out. (no blades)

 

[dun]

I;m in the same boat, been hanging on to them for years

 

[M-5]

I see generators on utube built from them . idk if they really work or not.