I think our 6th graders would love building the pens for their Wiimotes and
rolling their own Wiimote IWB for the Edusim project! Video:
http://www.youtube.com/watch?v=Cj3rgEe4lcwThis uses Johnny Lee's pen specs & calibration software here:
http://www.cs.cmu.edu/~johnny/projects/wiiFun Stuff.