Revolutionary 3D Building System - Transform ordinary train play into extraordinary adventures with the innovative ImagineTRAX system. Elevate tracks off the ground to create multi-level layouts that inspire creativity and problem-solving skills in young engineers of all ages. Special Connector Technology - Our exclusive connectors are the magic behind vertical building, seamlessly integrating wooden train tracks with Lego Duplo building blocks. Watch as children discover new dimensions of play by creating spirals, bridges, and towers that weren't possible before. Complete 80-Piece Set - Everything needed for instant fun is included in this comprehensive set with 17 ImagineTRAX connectors, 19 pieces of wooden train track, and 46 colorful blocks. The perfect balance of components to build the spiral mountain layout shown or invent your own designs. Universal Compatibility - Works flawlessly with all standard wooden train brands including Thomas, BRIO, Chuggington, Melissa and Doug, Expand your existing collection and breathe new life into track systems you already own without replacing anything. Engaging STEM Play Experience - Children develop critical spatial reasoning and engineering concepts while having fun. The open-ended nature of ImagineTRAX encourages hours of independent play, problem-solving, and the joy of creating something truly unique. Take your child's train play to incredible new heights with the ImagineTRAX Spiral Mountain Expansion Set. This innovative 80-piece set transforms traditional wooden track systems into spectacular 3D adventures, allowing young engineers to build upward instead of just outward. The magic happens through our special connector technology that seamlessly integrates wooden tracks with building blocks, creating multi-level layouts with spirals, bridges, and towers up to 8.5 inches tall. Compatible with all major wooden train brands including Thomas, BRIO, and Melissa & Doug, this set breathes new life into existing collections. Children develop critical spatial reasoning and engineering skills while enjoying hours of independent, screen-free play. Each set includes 17 connectors, 19 wooden track pieces, and 46 colorful blocks—everything needed to build amazing spiral mountains and countless other creative designs.