Answer:
What age most travelers have?
Rotten trees and Jack-O-Lanterns have this characteristic in common.
It is in every mountain, it's not in any hill, it's not in all the world, and yet it's in the mill.
What time of day, when written in capital letters, is the same forwards, backwards, and upside down?
What can get you there in eco style, pushed by your legs mile after mile?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?