I will give it this: it tried. It did try to make it good and even got Luke Wilson involved. Luke Wilson is good, but he can only do so much. He can't make up for the fact that the story was very flawed and the characters were underdeveloped.
The running "gag" with the bully was asinine. He was never funny and I got tired of the gag really fast. And the barefooted kid bit was kind of weak too. He hitchhiked to Florida? Yeah OK.
The movie felt like an average kiddie film at times with this underlining mantra: adults stupid, kids smart. And that bit gets tiresome.
But the only moments that were funny was the police cart Wilson drove around when he lost his squad car. I loved that little cart, especially when Wilson turned on the sirens. But, other than that, nothing else was worth my time. "D-"