Answer:
Many people own a copy of me. Without me the world would fall.
I am like thunder in your cranium
I go up and down at the same time. Up towards to sky and down towards the ground. What am I?
It's been around for millions of years but is never more than a month old. What is it?
I contain five little items of an everyday sort. You can find all five in a tennis court.
A little house full of meat, no door to go in and eat.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic