View-Master Monsters Inc. - 3 reels When a monster accidentally leaves a closet door open and an adventurous little girl crosses into the monster world, it causes all kinds of trouble for Monsters, Inc. Relive the fun of the movie with 21 fur-raising 3D pictures. Reels fit all View-Master viewers View-Master 3D products open up an exciting world of fun and adventure. You'll feel like you're there!