Answer:
I have legs but never walk, I may have flowers but no soil, I hold food but never eat.
What do you throw out when you need it but put away when you donβt?
What is as big as you are and yet does not weight anything?
Sometimes black, sometimes white, I have veins but no blood
You must keep this thing. Its loss will affect your brothers. For once yours is lost, it will soon be lost by others.
You use it between your head and your toes, the more it works the thinner it grows.