I help make your hair smooth and nice. I have many teeth but never eat. What am I?

I have a back but no legs, and sides but no skin. I tell stories, but I have no voice. What am I? Solve the riddle → You blow into me to make a loud sound. What am I? Solve the riddle → I grow bigger every year and never shrink. What am I? Solve the riddle → I run all the time, but never move a foot. I have a mouth, but never make a sound. What am I? Solve the riddle → I write and draw. The sharper I am, the better I work. What am I? Solve the riddle →