Geometric Cabinet ( Circle Tray) 6 Drawers: Square, Triangle, Circle, Polygon, Curved figures, Introductory tray. Bottom is blue so the child knows the inset goes into the frame. Leads to Geometry. Circle tray Introduces them to diameter. Cards come with a thick, Thinn outline and filled in shape. and order them from largest to smallest. Trains the hand and eye for visual discrimination of size. Trains the hands and muscle movements.