What Am I Riddles

Question: What has 3 feet but cannot walk?

Question: I'm written with two letters, said with one and seen with two.What am I?

Question: These are the three lives of mine:
So gentle I soothe the skin,
So light I caress the sky,
So hard I crack rocks.

What am I?

Question: I am a cold man without a soul. If there is warmth in me, it slowly will kill me. What am I?

Question: Follower of man, Dark as night, A trained Choreographer, Comes after light.