"Art Projects for Kids" has a wonderful and simple abstract winter tree lesson. I decided to add the extra element of decoupaging colored tissue for the trees. After a rectangle of tissued posterboard is dry, it can be cut into the triangle tree shapes. These are glued onto watercolor paper that has been divided using oil pastel or crayon and then watercolor washed into three different sections as well as a foreground. With an oil pastel lines and "v" shapes can be drawn on the trees. Lastly a hole puncher is used to add the white snowfall effect. The 2 colorful pieces below were done by a kindergartener and a 2nd grader.