First boy searches the ground around the
campfire. Second boy: "What are you looking for, maybe I can help you
find it.
First boy: "I dropped my favorite marble."
Second boy: "Where were you standing when you dropped it."
First boy: "Over there." (He points into the darkness."
Second boy: "Then why are you looking over there."
First boy: "Are you kidding? It's too dark over there. You can't see a thing."
-
Requirements
Do this one at night around the campfire or be sure to explain to the audience that it takes place at night.