Why did your sister go to the night school ?
Because she wanted to learn to read in the dark.

Lucy: If you eat any more ice cream, you'll burst.
Lindy: OK. Pass the ice cream and duck.

Mother: Jared, get your little sister's hat out of that puddle.
Jared: I can't mum, she's got it strapped too tight under her chin!

Janet: What's the difference between a cake and a school bus ?
Jill: I don't know.
Janet: I'm glad I didn't send you to pick up my birthday cake !

Karen: Have you noticed that Daddy is getting taller ?
Sharon: No, why ?
Karen: His head is sticking through his hair.

My sister is so dumb she thinks that a buttress is a female goat.

Danny: What are you doing, Sis ?
Marilyn: Writing my cousin a letter.
Danny: Why are you writing so slow ?
Marilyn: Because he can't read very fast !

Boy: Dad, Dad, come out. My sister's fighting this ten foot gargoyle with three heads.
Dad: No, I'm not coming out. She's going to have to learn to look after herself.

Sandra and Simon were arguing furiously over the breakfast table.
'Oh, you're stupid!' shouted Simon.
'Simon!' said their father, 'that's quite enough of that ! Now say you're sorry.'
'All right,' said Simon. 'Sandra, I'm sorry you're stupid!'