It is bad to lose your patience with your mother.
Kirby's toy broke due to being worn down from use, but Kirby's mother thinks Kirby broke it by being irresponsible.
Kirby wants to explain to his mother that he needs a new toy.
Kirby calmly explains that the toy wore out from being played with so much.
Kirby reacts poorly under pressure and screams that it wasn't his fault.
Kirby's mother replaces the worn out toy at the store.
Kirby gets the new toy, but he's grounded for a week and thus can't actually play with it.