Riddle:
Large as a mountain, small as a pea,
Endlessly swimming in a waterless sea.
What am I?
Answer: Asteroids.

Riddle:
From house to house I go, sometimes narrow, sometimes wide. And whether there's rain or snow I always stay outside.
What am I?
Answer: A Path.
Riddle:
You think about the past but end up in the future. What am I?
Answer: History.

Riddle:
When you take a look at my face, you will not find the number thirteen in any place. What am I?
Answer: A clock.
Riddle:
I am as small as a micron, stealthy like a spy, and I have always been caught. What Am I?
Answer: A Virus!

Riddle:
I am a driver but I never drive a car. What am I?
Answer: A screw-driver or a golf club.
Riddle:
I see without seeing. Noise is an ally.
What am I?
Answer: A bat.

Riddle:
Crimson I am born, yellow I dance, ebony I die. What am I?
Answer: Fire.
Riddle:
I am 2 in 54, a five-letter word, I am known as wild and some say unpredictable. I can raise you victorious or drop you to failure? What am I?
Answer: Joker.
Riddle:
Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?
Answer: Sun.
Riddle:
When you have me not, you want me. But when you have me, you do not know. What am I?
Answer: Sleep.
Riddle:
I do not exist. You cannot feel me or hear me, but if I were not to be you would all pass today. What am I?
Answer: Tomorrow, because it does not exist you can't feel it or see it but if it would not come we would all die today.
Riddle:
I last for a day, I always am in the middle, and I have a name. What am I?
Answer: I'm Wednesday.
Riddle:
I am present at the beginning of love, the start of life and I am the end of evil. What am I?
Answer: The letter 'L'.
Riddle:
I am the beginning of enemity; the end of life and love; honey can't be without me; yet sugar can be without me. I am the fifth child of my parent's 26 children. What am I?
Answer: The letter E.
Riddle:
I was once alive, a creature of flesh and bone. I did not survive, now I am but stone. What am I?
Answer: A Fossil.
Riddle:
You sit on me but I'm not a chair, I'm soft but I'm not a pillow and I'm always there for you when you need me. What am I?
Answer: Your bum.
Riddle:
I was born a blonde. I lived with the brown hair. I died a redhead. And buried as a brunette. What am I?
Answer: A Match.
Riddle:
I can swing but have no rope. What am I?
Answer: A door.
Riddle:
Split me in half, and you get me and another me. What word am I?
Answer: Meme.