This one was my favourite when I was younger:
How do you shoot a blue elephant?
With a blue elephant gun
How do you shoot a red elephant?
(the responder usually answers- With a red elephant gun) Hold it's nose until it turns blue then shoot it with the blue elephant gun.
What is the difference between oranges?
Biscuits because motorbikes dont have doors.
What is white and sits in the middle of a football field?
A fridge
Why did Billy fall off his bike?
Billy is a fish.
What is black and white and red all over?
A zebra with sunburn
What is black and white and red all over?
A penguin with nappy rash
What is black and white and re(a)d all over?
A newspaper