Answer:
Cycle Cycle Cycle.
A mechanism to discover who is following you.
You use it between your head and your toes, the more it works the thinner it grows. What is it?
Break it and it gets better, immediately set and harder to break again.
We are two brothers on opposite sides of the road, but we never see each other. Who are we?
What is big and yellow and comes in the morning, to brighten mom's day?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?