An adventure in color, light, and sound! Indulge your child's appetite for exploration by combining blocks to form new colors and sounds, or stack the blocks in a different order each time to from new and excitiing shapes. These smooth hardwood blocks feature transparent windows of strong plexi-glass in beautiful red, yellow, blue, and green. Looking through colored panes transforms a child's world over and over again as the principals of light and color are discovered. Adds fun, beauty, and dimension to block building! This 42 Piece Original Rainbow Blocks Deluxe Set includes assorted shapes.