Roller coasters offer an exhilarating experience, combining high-speed thrills with moments of weightlessness. The Spacerail Level 4 allows you to build not just one, but five distinct roller coasters. Each track is a continuous loop of twists and turns, featuring glow-in-the-dark capabilities for a mesmerizing visual display in the dark. You can disassemble and rebuild your creations, offering endless entertainment. This set is ideal for intermediate users who enjoy building or are fascinated by kinetic toys like Newton's cradles. Specifications: Rail length: 26,000mm, Assembled size: 72 x 34 x 36cm, Steel balls: 4pcs, Difficulty: Intermediate Level 4, Assembly time: 7-8 hours. Requires 1 x C cell battery (not included). Rechargeable batteries are not recommended.