If you liked this movie, you should also see: Shrek (2001)Another Gay Movie (2006)And Now for Something Completely Different (1971)Yellow Submarine (1968)WALL-E (2008)
In order to power the city, monsters have to scare children so that they scream. However, the children are toxic to the monsters, and after a child gets through, 2 monsters realize things may not be what they think.