Roll the aluminum foil into balls and set aside. (I made one for each color of paint.)
Add the paint to a paper plate or other surface.
Paint the tree trunk and branches on the white paper.
Begin painting with the aluminum foil by dipping the foil balls into the paint and stamping it on the paper. Continue until you reach the desired "look."
Add a name to the tree trunk with the back of the paintbrush. (optional)