My personal favourite hacked item he makes is the 'cheapy lighter laser burner;' a lighter that uses a laser instead of a naked flame resulting in probably the coolest party trick ever. Check it out yourself in link 2.
Link 1: Channel Link; http://www.youtube.com/user/kipkay
link 2: Laser Lighter; http://www.youtube.com/watch?v=5erjj6aS5Ws&NR=1
Link 3: Kip's personal website (links to his youtube vids) http://kipkay.com/