This project works great for grades 2-6. First of all, we discuss the shape of an evergreen tree in it's 2-D form (if we were drawing it). Then we discuss the 3-D form of a triangle...the cone. Next, I demonstrate how to make a cone out of green construction paper, make 'fringe' on the edges to resemble pine needles, and stack cones in various sizes to make the tree taller. Lastly, I make a mixture of white paint, glue, and water and let the kids splatter some snow and glitter on top of their trees.