Riddles, knock-knocks, put-downs, jokes, gags, and groaners: this collection’s a grab bag of humor to make kids hoot and holler!  Why shouldn’t you tell a secret to a pig? Because he is a squealer. Why did the orange stop in the middle of the road? It ran out of juice.What word grows smaller when you add two letters to it? Add “er” to short and it becomes “shorter.” Where do pilots keep their personal things? In air pockets. From modern nursery rhymes to kooks and spooks, from “hey, waiter!” to exercising with dumbbells, there’s plenty of belly laughs here to enjoy and share with friends.