Tieramid  Rainbow Arches Plus are brightly colored wooden blocks in the shapes of half circles and arches. The shapes design allow them to be arranged in many different configurations. Use the included set of colored pattern cards to create the shapes on the included cards. This set includes 11 colored blocks with a 12 card deck. Promotes eye-hand coordination, physical relationships such as large / small, inside / outside, down / up, tall / short, shape recognition, color recognition, problem solving skills, language and creative thinking.