chiquito mexicanito
ummm i would go with a grand prize. such as maybe a X-BOX360 andthe newest game E.G halo reach (when comes out) Call Of Duty Black OPS (once again when comes out) Or something like that And xbox live 1year membership (if old one) and A game store gift card (IT MITE B EXPENSIVE THO!!!)
or just a Xbox, PS3 or Wii related item, reguardless of the what it is it will draw some atention. give hints as you what it is but not enough to get them to figure out so fast, you'll selll tickets and the more it grows the better prizes you ccan shell out in the future, etc (sorry for my s**t spellling just got off work stare )