The scare simulators are fake robotic children used by monsters as demonstrations for scaring children to monsters that aren't used to scaring real human children in Monsters, Inc. and its prequel Monsters University. They resemble animatronic children who only have upper torsos and their pelvic areas are completely bolted to a bed inside a fake bedroom, with one of the walls being able to come down to resemble a real bedroom without any monsters outside noticing.