These homebrew Wiimotes consist of an infrared LED from RadioShack, a 1.5v button battery, clothes pins, electrical tape, optional chopsticks for support, and a few more choice ingredients. Check out the below link for the full recipe.
WiiMedia in $5 and 15 minutes, [via]
http://blog.makezine.com/archive/2008/06/build_a_wiimote_from_uten.html