This must now dry before you can go on. So now is when we went out and played in the leaves and collected for the rest of the picture. I took the colored leaves right off the trees because they were still fresh and not dried out and crumbly. Pinch off the stems.
When the paint is dry, give the child the leaves, and a small container with white glue and let them "paint" glue on the back of the leaves and glue on their "tree" and falling on the ground.
This is a great time to talk about fall and what happens to the leaves, colors, back and front. Small children will need to have it explained that the fingers of their hands are the branches of the tree and the arm is the trunk. It's very interesting to note how each child interprets it. Some will just glue leaves all over the place willy, nilly while others will be quite particular about keeping all the leaves on the top of the tree while others will make very particular lines of leaves falling to the bottom.
You can finish it off with some cotton ball clouds.