Children's jokes that a 4 year old can learn please!!

[Starbear]

My DS loves telling jokes but I only know 'What do you get on the beach with a witch, a sandwitch...' he loves it and I love watching him laugh.

My DS will LOVE these! I'm horrifically awful at jokes.

Why did the banana go to the doctor?

He wasn't peeling very well.

Not really a joke as such, but we've had recent hilarity at bath times with my 2.5 year old recognizing how similar the world 'shampoo' sounds to 'some poo'. She never fails to crack up when I offer to put 'some poo' on her hair.

Two that mine heard last Hallowe'en and are still laughing at:

Knock Knock
Who's there?
Bear
Bear who?
Bear bum!

Knock Knock
Who's there?
Europe
Europe who?
No, you're a poo.

Knock knock
Who's there?
Mary
Mary who?
Mary Christmas and a happy new year

And dunop who? one from up thread

Why are pirates called pirates?

Because they aaargh! (said with a pirate accent)

Three kids, walking through a forest. Suddenly they see a slide and a fairy, who tells them the slide is magic and whatever they shout as they're sliding down, they will land in a big pile of it.

First kid slides down and shouts 'ICE CREAM!' and lands in a big pile of strawberry ice cream. Eats it all obv.

Second kid slides down and shouts 'CHOCOLATE CAKE!'

Third kid forgets and shouts 'WEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE....'

Why did the precipice?
Because the seaweed.

Why did the mushroom go to all the parties?
Because he was a funghi!!

Why couldn't the car play football?
Because he only had one boot.

What's orange and sounds like a parrot?
A carrot.

Told to me by ds2 (5):

Why did the sheep cross the road?
To go to the baaa-bers.

Why did the pig cross the road, roll in the mud then cross back over?

Because he's a dirty double crosser

what do you call a man with 6 rabbits up his bum?

Warren

What fish sleeps underwater?
A kipper

here is our "poo" version...

knock knock

who's there?

Smell Mop

Smell Mop Who?

Smell your poo?! I dont think so!

The other great favorite (or if I am honest, the only other one he gets) is:

What is brown and sticky?

A stick!

DS's fave joke at that age:

What do you call a man with a boulder on his head?

Squashed.

Why did tiger look down the loo?

Because he was looking for Pooh!

What wobbles in the sky ?
A jelly copter !!!!

DS(4)'s favourite delivered with complete lack of comic timing

Doctor, Doctor, I think I need a pair of glasses
You certainly do, this is a Fish and Chip shop

Why do giraffes have long necks?

Because they have smelly feet.

Did you hear about the magic tractor?
It went down the lane and turned into a field.

Where di fish keep their money?
In a river bank.

What do penguins wear on their heads?
Ice caps.

What wobbles in the sky?
A jellycopter

(all of the punch lines are interchangable and still as funny if you are my DTs)

What did the Baby corn say to the Mommy corn?
"Where's Pop corn?"