This is a simple activity to help students sort and classify circles and squares. They get a sorting mat with two blank trees. Then they have to "decorate" the trees with the correct kind of ornament. All the circles on one tree, all the squares on the other. There are two groups of shapes that you can give the students to cut. One has more shapes, which are smaller; the other has fewer shapes and they are larger. You can choose which level your students are at with their cutting skills, or how much time you have.