You should be nice to people in their birthday.
Sally is having a birthday party and is opening presents in front of her friend Sam.
Sam wants to play with one of Sally's presents.
Sam asks if he can play with one of Sally's presents while she opens another.
Sam takes the present without asking and runs off to play with it.
Sally lets Sam play with her present while she opens more presents.
Sam is berated by his parents and is sent home from the party.