The basic block box is perfect for novice marble track explorers. It contains everything you need to build spectacular marble runs: two base plates, lots of track elements, construction blocks, marbles and of course an extensively illustrated manual. 123-piece set offers endless possibilities for endless fun. - 50 track elements - 67 construction blocks - 2 base plates - 4 marbles - 100% compatible with LEGO DUPLO building blocks Due to a large amount of elements and building blocks in various shapes, colors and sizes, there are endless combination possibilities, from simple constructions to complex scaffolding, all of which give immense pleasure. Children develop in a playful way in this way. The little master builder becomes familiar with gravity and acceleration, improves their motor skills, their creativity and their logical thinking. The Hubelino block system is 100% compatible with building blocks from other manufacturers. They do not wobble, do not slip or fall over. To ensure that the marble always rolls safely into the target, we at Hubelino pay attention to good design, accuracy and quality. All Hubelino products are responsibly manufactured in Germany from high-quality ABS plastic, comply with European EN71 standards for children's toys and carry Bureau Veritas' CE mark for product safety.