Some jokes my 4 year old has brought back after 3 days in school:
Q. Why did the cow cross the road?
A. Because it wanted to go to the MOO-OO-vies.
Q. Why did the cow get in the rocket?
A. Because it wanted to go to the MOO-OO-n.
Q. Why did the bread loaf go to the doctors?
A. Because it was feeling crumby.
Q. What do you get if you put a rabbit in the oven?
A. A hot cross bunny.
These made me laugh. A lot.
(I don't get out much)