What goes through cities and forests but never moves?

I help make your hair smooth and nice. I have many teeth but never eat. What am I? Solve the riddle → I am round and you can throw me. I bounce! What am I? Solve the riddle → I am a big, cold house for food. But I have no roof and no windows. My door opens to a bright light, and inside are treasures kept perfectly chilled. What am I? Solve the riddle → I have many colors and sides. You twist me until all the colors match up. What am I? Solve the riddle → I can be filled with food or candy and often have a lid. What am I? Solve the riddle →