Lego has a building set called Propeller Power #6745. 
Here’s a very cool video of how it is built…
LEGO Creator – Propeller Power from Brian Stark on Vimeo.
Check out these other airplane Lego sets with prominent propellers…
Propeller Power Lego Set
May 16, 2011 By
Making a Propeller
March 27, 2011 By
Because it’s fascinating… here’s everything you never knew about how propellers are made.
httpv://www.youtube.com/watch?v=65sdTFdj5VU
httpv://www.youtube.com/watch?v=RYprHKWqZ5E