The Hubelino Mega Building Box Set is a marble run set designed for young engineers and builders who love marble mazes, ball runs, and toy building sets. With 585 pieces, including marble track components, base plates, and marbles for kids, this STEM toy challenges children to design, build, and race their own marble runs. Perfect for kids building toys, this marble race track set features six unique extensions, allowing endless configurations for exciting marble races. The included instruction book provides three giant assembly ideas, including a ball maze and marble race track, helping kids explore engineering toys in a fun, hands-on way. Why This Marble Run Stands Out: Best STEM Toys for 5-Year-Olds & Up – Ideal for marble runs for kids 4-8 and engaging for marble runs for kids 8-12 Mega Size for Maximum Fun – 585 pieces allow for epic building projects Compatible with Other Building Sets – Works with standard bricks for limitless creativity Durable, High-Quality Design – Made in Germany for long-lasting play Perfect for 7-Year-Old Boy Birthday Gifts & Budding Engineers! Start your marble run wooden adventure today and build the ultimate marble race track with Hubelino’s premium building sets!