I first saw this movie as a hotel room rental I bought to pacify the kids whilst I was trying to answer some email. I wandered into their room, began to watch, and promptly fell on the bed laughing so hard there were tears in my eyes.
This is one of the most inventive, mind grabbing, rioutous kids movies I've ever seen. Quotes from it have become part of our familial lexicon. To ineptly rip off a line from another movie, "it had me at 'Rat Birds!'"
The movie's greatest of many charms is its incredible and non-stop inventiveness that's manifested in everything from the smallest details to the rapier sharp use of cameos by Mr. T. and others. The lead characters are another strong point. Utterly unique and idiosyncratic, the mad scientist and the brainy meteorologist are whole and real enough to be discussed. This is, I must admit also true of mustache-obsessed Steve (a monkey), Cliff's hirsute, monosyllabic father, the nefarious mayor, and the run-away t.v.
I am not generally a fan of the Characters-With-Giant-Eyes-And-Outsized-Heads school of animation on display in "Cloudy," but it's used so well in the film that its serviceable and not a detriment. We didn't see the movie in 3D, so can't speak to that.
See it! See it! Laugh yourself silly. Then talk about the other issues the movie trenchantly addresses: greed, gluttony, identity, and monkey thought translators.