Radial symmetry is such a beautiful and simple design principle from a daisy or sun to a very complex design. Students created these designs without bothering with compasses or protractors in order to improve their skills at "eyeballing" the symmetry of the details. Students watched a great video about radial symmetry on the SMART Board before we began. These students learned radial symmetry using sticky squares when they were younger so they had prior knowledge of the concept. (See Animoto below)