Little child's tips to waiter

A 10 year old boy went to an ice-cream shop & asked :How much a cone costs? Waiter said-"Rs. 15".The boy started counting how much he had in his wallet.Then he asked how much a small cup cost?The irritated waiter said:"Rs.12".The boy asked for a small cup.He had it,paid the bill & left.when the waiter came to pick the empty plate,he was touched.The boy had left Rs.3 as a tip for him.
Moral:Try n make someone happy with something u have.