At the end of Monsters, Inc., what produces more energy than screams?
Answer
Children’s laughter
At the end of Monsters, Inc., children’s laughter produces more energy than screams.
The discovery changes the entire business model of Monsters, Incorporated. For most of the film, monsters believe that frightening children is the best way to power Monstropolis. After Boo laughs during a playful interaction with Sulley and Mike, the monsters learn that laughter yields a much greater energy return.
This is not merely a symbolic change. The film presents laughter as a measurable and usable source of power, allowing the factory to move away from fear-based collection. Sulley and Mike become part of the new approach, with Mike using comedy to make children laugh.
The discovery also resolves the film’s central conflict. Children are not inherently dangerous to monsters, and the company’s old assumptions are shown to be both cruel and inefficient. The final scenes depict a transformed factory built around entertaining children rather than terrifying them.