Answer:
This is a dead giveaway
You use it between your head and your toes, the more it works the thinner it grows. What is it?
Never ahead, ever behind, yet flying swiftly past; For a child I last forever, for adults I'm gone too fast.
What cleans as it gets dirty only to get clean the more you use it?
It carries paper of the most important sort but also plastic, I'm glad to report. What is it?
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?