So we did leaves too. We painted a tree with red, yellow, and orange paint. We just did paint sponge stamp so that it wasn't a giant brush of color but more like leaves. He did a good job. We read about leaves and sang, "see the leaves falling down." Of course it was to the tune of "London Bridge."
Next day we went outside and picked brown leaves and 3 yellow ones that were still soft. We crunched up the brown leaves and drew a tree and glued the dried leaves onto it to look like "tree glitter."