Aliens in the Attic (2009)

ALIENS IN THE ATTIC, co-scripted by one of the writers of "Madagascar" and the Academy Award®-winning "Wallace and Gromit: The Curse of the Were-Rabbit," is an adventure/comedy about kids on a family vacation who must fight off an attack by knee-high alien invaders with world-destroying ambitions. At the same time, the youngsters work hard to keep their parents in the dark about the battle upstairs.