This poem is a bit of toughy, so I'm putting it at 20 points.
Thin as string and strong as steel,
I make my house like a wheel.
To some a home, to others doom,
I will build it when you leave your room.
What am I?
As well I'll give out 7 points to the 5th, 10th, and 15th people to post a comment.
There are 10 points for the first person to write the first 10 elements of the Periodic Table.
As well, I'll give 3 points to anyone who writes his last name - however, if they misspell his last name, then he'll loose 3 points for each letter of said misspelled name.
Image from the Life Image Archive