Little Monsters

Little Monsters is a 1989 American fantasy comedy film starring Fred Savage as Brian Stevenson, a sixthgrader who has recently moved to a new town, and Howie Mandel as Maurice, the monster under the bed.

Lonely after moving away from friends, Brian finds himself blamed for several things he apparently has not done. A quart of ice cream is left in the cupboard, Brians bike is left on the driveway causing his father to crash into it on his way to work. Brian insists he is innocent and blames his brother, Eric, who claims to have seen a monster the night before. As revenge, Brian snatches Erics lunch and tosses it out the window, hitting Ronnie Coleman, the school bully who boards the bus and antagonizes Brian.That night, while sleeping in Erics room for a bet, Brian hears a loud noise, the source of which quickly disappears under Erics bed. The next night, a determined Brian sets booby traps and captures the intruder a blueskinned monster named Maurice. Though scared at first, Brian soon discovers that he and Maurice share the same interests and befriends him. Over the course of several nights, Maurice shows him a fun time in the monster world beneath Erics bed. It consists of every childs dream all the junk food and video games they want, and no adults to tell them what to do. It also has innumerable staircases leading to the spaces beneath childrens beds, from which the monsters cause trouble. Maurice and Brian have fun making mischief in other peoples homes, and Brian feels he has found a true friend at last although Brian seems to be changing. He learns that he is turning into a monster, as his body parts shrink when the light hits him. ........

Source: Wikipedia