More marbles, more fun! With 12 extra marbles in the color combinations red/yellow, blue/yellow, and green/yellow, your marble run will be even more colorful and fun. • 100% compatible with building blocks from other manufacturers: All Hubelino products match perfectly with building blocks from other well-known manufacturers and are therefore an ideal addition to your existing building block stock. • Made in Germany for excellent product quality: All Hubelino products are manufactured exclusively in Germany according to the highest quality standards. • Learn through play with STEAM building sets: Hubelino's products focus on a balance between fun and learning. That's why the learning content is always at the center of the development of new products and the clever design of toys with added educational value.