Dear youngsters, could you answer the following questions.

1. I run smoother than any rhyme, I love to fall but cannot climb. What am I?
2. I help engines spin and pants stay up. What am I?
3. There is one in every corner and two in every room. What am I?
4. You seek me out, when your hunger's ripe. I sit on four legs, and smoke a pipe. What am I?
5. When I come in, from sea to shore, twenty paces you'll see, no less, no more. What am I?
6. Break me and I am better, immediately set and harder to be broken again. What am I?