The Yamba Helix 1 adapter set opens up entirely new building worlds for little explorers. With the Helix building system, existing play materials like wooden railways or building blocks can be creatively expanded and built upwards. The sturdy lift supports also allow for safely constructing larger structures. All parts are compatible with common wooden railway tracks and building blocks, ensuring imaginative building and endless play fun. Helix 1 contents: 1 wooden roller Rolli, 10 lift columns, 11 Link-Up adapters, 1 adapter bar, 1 Cross intersection. (Tracks and building blocks not included)