Money Kumar appears in a flash!

Money Kumar: You want to learn even while on a picnic?

Children: No Money Kumar. We have a problem. The ice-cream seller refuses to give us ice-cream saying that the money we gave him is spoilt. Can you teach him a lesson?

Money Kumar: Are you crazy?
Children: Why?

Money Kumar: Because there's a very simple solution to your problem.
Children: What's that?

Money Kumar: Come with me. I'll show you!
Money Kumar takes them to the ice-cream seller.
Money Kumar: Hey, why did you refuse the money?