UPDATE: The broken link is fixed.

From the Cleveland Fed:

Think about a dollar bill.

If you’re hungry, you can’t eat it; in a rainstorm, it won’t keep you dry. But you can trade it for an apple or an umbrella. If you lived in a world without money, how would you get the things you want and need?

Play Escape from the Barter Islands to find out!

If you are a young student, a teacher presenting economic concepts to young students, or simply someone who feels like a young student, give it a shot.