Answer:
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground. It holds pale gems of blue.
We are five little objects of an everyday sort. You will find us all in a tennis court.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
Hands she has but does not hold. Teeth she has but does not bite. Feet she has but they are cold. Eyes she has but without sight.
What is it which builds things up? Lays mountains low? Dries up lakes, and makes things grow? Cares not a whim about your passing? And is like few other things, because it is everlasting?
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?