Fun Riddles

Question: A man is walking through the park one day and sees a group of four boys standing in a circle. A smaller boy is holding a large stick and hands it to a larger boy saying "I couldn't do it, your turn."

The larger boy swings the stick twice and the other two boys go to the ground. The smaller boy says "I'll get 'em next time." The man walks away smiling.

What just happened?

Question: I am a cave full of bones,
and the house of a worm.

What am I?

Question: You can rest on my pad without touching the keys.
I will sing all month long as long as you pay your fees.

What am I?

Question: You have two books. One of them is upside-down and the other is rotated so the top of the book is facing you.

What is the sum of the first page in each book?

Question: A man murders his wife with a knife in their car. Nobody is around to see this. He throws her out of the car being careful not to leave any fingerprints on her body. Next he throws the knife off of a cliff into a gorge where it will never be found and he goes home. An hour later the police call him and tell him that his wife has been murdered and he needs to come to the scene of the crime immediately. As soon as he arrives, he is arrested.

How did they know he did it?