Observe shapes and color with this 8-piece set of Perception Cubes! These cubes measure 1.5" and they're made of durable acrylic, making them ideal for all ages. Children can hold the transparent cubes at different angles for stunning visual effects. The cubes can be mixed on a light table to observe color mixing. The cubes are easy to clean with warm, soapy water. Cubes include 8 colors: purple, pink, blue, green, red, yellow, orange and clear. Size: 1.25".