This set includes 8 Perception Cubes in different transparent colors: purple, pink, blue, green, red, yellow, orange and clear. The cubes are made of durable acrylic which is smooth and warm to touch. Smaller rectangles and squares appear inside the cubes when viewed from different angles, creating a fascinating visual effect. Children can observe color-mixing when they place the cubes next to each other. A beautiful addition to sensory play and color exploration, these cubes are also great light table accessories. Fascinate all ages by the color, view and feel of these cubes. For ages 0+. Size of cubes: 1.25”.