Hape Super Spirals Quadrilla Wooden Marble Run Toy Expansion Pack with Spiral Twists Xylophone Rail and for children aged 4+

129-PIECE SUPER SPIRALS TOY : More spinning and surprises with this 129-piece deluxe quadrilla set; Marbles travel inward on the concave side of the two-sided spiral twists and outward on the convex side ABUNDANT ACCESSORIES : Four special control blocks randomly distribute marbles; A rotary tower, xylophone rail, transparent tunnel and other accessories improve the versatility of this set A LOT LIKE CODING : Hape’s quadrilla, a unique marble run system, has been praised by The Wall Street Journal as the ideal toy for teaching kids how to code STEAM EDUCATION : Quadrilla encourages spatial thinking and problem-solving and helps develop an understanding of Science, Technology, Engineering, Arts and Maths (STEAM) principles FAMILY ACTIVITY : As a family activity, this quadrilla enhances parent-child interaction and bonding; APP FOR INSTRUCTION : The Hape Quadrilla app gives step-by-step instructions and a sharing platform;