Answer:
There is one in every corner and two in every room.
When it comes to me you go on red and stop on green.
I am made of wood but can't be sawed? What am I?
My head bobs lazily in the sun. You think I'm cute, for my face is yellow, my hair is white and my body is green. What am I?
What has banks but no money a bed but no sleep waves but no ocean?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.