Me: Wanna hear a joke? Dog: sure Me: Knock knock *dog goes crazy barking at the door*

Knock Knock Who's there? Interrupting cow Interrupt... MOOOOOOOO!! (Kids seem to love this one)

Knock Knock.... P2:Whos there? P1:A bonus P2:A bonus who? P1: A bonus something a dog likes to chew on

Why did the chicken cross the road? To knock knock on the door, walk into the bar and change the lightbulb.