This set features 10 acrylic circles in assorted colors. They're solid and polished with smooth edges. Use them for color mixing, stacking and balancing. Place them on a light panel or hold them in front of a window to create colorful shadows and watch colors dance. These colorful manipulatives are appealing for children to handle, which makes them an excellent resource for open-ended, sensory play. The high-quality, solid acrylic is easy to wash. And they're designed to last for years of classroom or home use. For ages 3+. Size: 1" cube.