Cut a basic apple shape out of a piece of cardboard.
Using either red or green yarn, wrap the yarn around the apple cut-out until it is completely covered. Tuck the loose end into the back side of the apple.
Glue a small twig to the top back of the apple so it sticks up at the top as the stem. Cut a small leaf from the green felt and glue it to the center of the top of the apple at the base of the twig.