Answer:
I run through hills. I veer around mountains. I leap over rivers and crawl through the forests. Step out your door to find me. What am I?
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?
What has one head one foot and four legs?
I'm white and used for cutting and grinding. When I'm damaged, humans usually remove or fill me. For most animals I am a useful tool. What am I?
I am full of holes but still holds water.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?