This lesson was inspired by the illustrations in the book "Stars" by Norm Kohn. I bought the book on a clearance rack because of the pictures. The stars in the book are watercolored and set on black backgrounds with white line drawings.
The first part of the lesson was teaching the students about warm colors, where they covered papers with washes of the colors and added bits of sparkle paint.
We talked about trees, how the trunks and branches grow. Each student glued white paper along the bottom of the page for snow. I cut brown strips of varying sizes and hue and they glued them on to create trees.
The next class I showed the students how to glue white scraps on top of the branches like how we observe the snow on trees outside. They also cut out stars from the watercolor paper and added them to the sky. The results were beautiful. I need to dig up the other photos of the finished products!
Accompanying books can include not only "Stars" by Norm Kohn, but "Draw Me a Star" by Eric Carle, and "The Snowy Day" by Ezra Jack Keats.