The giving tree / Recycling knife

Once a day, the boy wanted to eat some cake.
The tree said, “Cut the cake using me.”
After cutting the cake, the boy wanted to put a piece of cake on a plate.
The tree said, “Put the piece on the plate using me.”
After putting the piece on the plate, the boy recognized that he had no fork at the moment.
The tree said, “Now, there is only a branch which remained in me. Eat the piece of cake with it.”
So like that, the tree gave his all things to the boy.