Answer:
I tremble at each breath of air, and yet can heaviest burdens bear.
My prefix is food. My suffix is rude. My infix comes in rounds. I keep you off the ground. What Am I?
Three lives have I. Gentle enough to soothe the skin. Light enough to caress the sky. Hard enough to crack rocks.
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?