Riddle: I act like a cat, I look like a cat, Yet I am not a cat. What am I?
Answer: Kitten.
Riddle: Why weren't the tennis players allowed in the restaurant?
Answer: Because they make too much racquet. 
Riddle: There is a brother and a sister. The boy wants to visit his father in jail, and the sister wants to visit her mother in the hospital. But they both are not allowed in the jail or hospital. All they have is a gun. What do they do?
Answer: The boy shoots the girl, and then the boy goes to jail for attempted murder and the girl goes to the hospital due to her injuries.
Good Riddles
Riddle: What is harder to catch the faster you run?
Answer: Your breath!
Riddle: Why does the teacher wear sunglasses when she comes to the class?
Answer: Because the students are bright.
Good Riddles
Riddle: Which bird does not belong in this group? Finch, gull, eagle, ostrich, or sparrow?
Answer: The Ostrich. It's the only bird that doesn't fly.
Riddle: I am four times as old as my daughter. In 20 years time I shall be twice as old as her. How old are we now?
Answer: I am 40 and my daughter is 10.
Good Riddles
Riddle: It has a long neck, a name of a bird, feeds on ships' cargo, and is not alive.  What is it?
Answer: A crane.
Riddle: Which of the following words don't belong in the group and why? CORSET, COSTER, SECTOR, ESCORT, COURTS
Answer: Courts. All of the others are anagrams of each other.
Riddle: I am wet when drying. What am I?
Answer: A towel.
Riddle: Which three letters can frighten a thief away?
Answer: I C U (I See You!).
Riddle: I am strong enough to smash ships, but I fear the Sun. What am I?
Answer: Ice.
Riddle: There are 2 ducks in front of 2 other ducks. There are 2 ducks behind 2 other ducks. There are 2 ducks beside 2 other ducks. How many ducks are there?
Answer: Just four, in a square formation.
Riddle: Why can you not trust Atoms?
Answer: Because they make up everything.
Riddle: A father's child, a mother's child, yet no one's son. Who am I?
Answer: The daughter.
Riddle: I'm found in socks, scarves, and mittens. I'm found in the paws of playful kittens. What am I?
Answer: Yarn.
Riddle: Tom and his younger sister were fighting. Their mother was tired of the fighting and decided to punish them by making them stand on the same piece of newspaper in such a way that they couldn't touch each other. How did she accomplish this?
Answer: Tom's mother slid a newspaper under a door, each sibling standing on each side.
Riddle: While on my way to St. Ives, I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, and wives. How many were going to St. Ives?
Answer: Just one, me.
Riddle: What kind of running means walking?
Answer: Running out of gas!
Riddle: What has a foot on each side and one in the middle?
Answer: A yardstick.