Introduction to the Littles: tiny beings who look mostly human, with the exception of their tufted tails and protruding incisors (I swear, they're a lot cuter-looking than they sound), and live in human homes. They secretly exchange goods for small services; for example, they may take food from a human's cupboard, and later "pay them back" by finding said human's lost car keys and leaving them in a place they are sure to look.
This movie is mostly about a Little brother and sister who are accidentally separated from their family, only to find out that their old home will be torn down in a matter of days. Their grandfather and dim-bulb cousin mount a rescue attempt, and they spend the rest of the movie trying to get back home and warn the oblivious parents before the bulldozers come. Along the way they have to avoid rats, humans, cats, and mousetraps, to name a few.
To fans of fairy tales involving brownies and elves, or even literature such as "Stuart Little" or "The Borrowers," this is nothing new or different. Still, it is a good, more modern reworking of this idea, and should be entertaining to most children with an imagination. The characters are never too cutesy or annoying, and the situations are exciting enough to keep one's interest. As a plus for parents, the bantering dialogue can be quite funny to both children and adults at times, without any of the snide flavorings that darken most cartoons today.