It's bad to throw tantrums.
Prince has a birthday party and doesn't get the present that he really wanted.
Prince wants to get the desired gift.
Prince offers to trade some of his presents for the gift that he wanted.
Prince throws himself on the floor and shouts that he wants the desired gift.
A friend who owns the desired gift trades some gifts with Prince, and both of them are happy.
Prince's friends get disgusted and leave the party.