Here are some randomly selected joke topics
Whales
Save the whales - collect the whole set
Boss
Job Applicant: Have you got an opening for me?
Boss: Yes, and don't slam it on the way out.
Cannibals
1st Cannibal: Am I late for supper?
2nd Cannibal: Yes everybody's eaten.
Cricket
What do you get if you cross an American pioneer with an English batting game?
Davy Cricket.
Talking
Keep talking, someday you'll say something intelligent.
Chickens
Why did the chicken cross the road, roll in the mud and cross again?
He wanted to be a dirty double crosser.
Caveman
What do you call a caveman who is wandering slowly around the place?
A meanderthal man.
Dog
Mary: Our dog is just like one of the family.
Jane: Yes. I can see the resemblance.
Exam
What is black and white and hard all over?
An exam paper.