I don't understand why they didn't just make this a sequel to 'Liar, Liar' and have the kid be pissed that he says "No" all the time to stuff, so he makes a wish.
The kid from Liar, Liar is 20 now. He'd be DEEP into therapy at this point.
They could make a movie where he's so hideously scarred by the one wish that he made that came true, that all the wishes that HAVEN'T come true have driven him insane.