A little boy enters a barber shop

A little boy enters a barbershop and the barber whispers something to his customer; “This is the stupidest child in the world. 

Watch while I prove it to you.”

The barber puts a dollar bill in one hand and two quarters in the other, then calls the boy over and asks; “What do you want, son?”

The boy takes the quarters and leaves.

What did I tell you?” said the barber.

“This child never learns!”

Later, as the customer leaves, he sees the same boy coming out of the ice cream parlor.

“Hey, son! Can I ask you something? Why did you use the quarter bill instead of the dollar bill?”

The boy licked his cone and replied, “Because the day I take the dollar, the game is over!”