Good Riddles

 
Riddle #33 (easy)

Question: What is the center of gravity?

Riddle #32 (easy)

Question: Why did the hamburger go to the gym?

Riddle #31 (easy)

Question: What jumps higher than a building?

Riddle #28 (easy)

Question: I can be cracked, I can be made. I can be told, I can be played.

What am I?

Riddle #27 (medium)

Question: What jumps when it walks and sits when it stands?