This set features 10 translucent gem cubes in different colors of the rainbow. Explore creative play and early learning activities with these colorful manipulatives. Explore creative construction, counting and color-mixing activities with these colorful manipulatives. Stack, balance, count and create patterns with these colorful gems. Investigate color mixing and cast shadows. Use them in the sunlight or on a light panel! These chunky cubes are finished with smooth edges that are perfect for small hands. They are also lightweight and easy to clean. Made with durable, polished acrylic, this set is designed to last for years of classroom or home use. Keep kids engaged with fascinating colors and lights. They also make satisfying sounds when tumbled together. Promote calm concentration in sensory stations and calming corners. For ages 10m+.Size of cubes: 1in.