5) Did you hear about the boy who stole the rhubarbs? He was put into custardy!
4) What do you get when you cross a leopard with a watch dog? A terrified postman!
3) How do you make a potato puff? Chase it around the garden!
2) Have you heard the joke about the pencil? Well, never mind; there's no point.
1) What's green, short, and goes camping? A boy sprout!