Interlox Discs provide colorful, easily interlocking building pieces to engage children in open-ended play. Discs are made of colorful, translucent plastic with multiple notches for flexible building. Use the five beautiful colors to explore color theory on the LED Light Tablet or for other light and color activities. Children explore the concepts of symmetry and asymmetry while strengthening their design, structure and engineering skills. Use with the original Interlox for even more combinations.