Ravensburger GraviTrax Expansion Set Tunnel Set Construction Toy 26820 7

[GraviTrax Series] GraviTrax is a system toy that uses the principles of gravity, magnetism, and power to allow anyone to easily create original, action-packed courses. The tunnel set is an expansion set that adds new action to your layout, including tunnel parts for creating blind courses, tracks that can pass over steep drops, and tracks that drop balls directly under overpasses. [Build your own original course design] You can combine various parts to freely design a course, so you can create a different course every time you play. There are a total of 26 parts included, and you can play by combining them with the starter set, which is sold separately. [Experience STEM fields in a fun way] Through play, children can experience and learn about STEM education (Science, Technology, Engineering, and Mathematics). [Set Contents] Instruction manual, base plate x 2, curved tunnel x 4, straight tunnel x 2, switch tunnel x 2, vertical U-turn tunnel x 2, basic tile x 6, straight tunnel tile x 2, curved track x 2, O-shaped track x 2, catcher x 2 【What is GRAVITRAX?】GRAVITRAX is a track system where you build courses with your own original designs and race balls through them. You can create a variety of courses with your imagination, and enjoy creating original courses using expansion sets and additional parts.