S1E39 - The Strong Boys Wager
You know, I was skeptical at first. But I really think this monster trap thing is going to work out. Children have this inate ability to strip away all aspects of the problem that adults are clouded with, which makes finding a good solution so much easier. Who cares if trying to put a monster into a giant hole is logistically and practically improbable at best, not to mention the trouble they have to go through...but there I go thinking like an adult again. Like I said, this is going to be great.