678-7 105Pcs Marble Run Building Set STEM Educational Toy 3D Puzzle Track Construction Kit for Children

• 【Safe ABS Construction】Made from durable, non-toxic ABS plastic with smooth edges to prevent scratches, ensuring safe play for children while maintaining structural integrity during extended use.
• 【Complete 105-Piece Set】Comprehensive building set includes 105 colorful components plus 30 marbles, featuring various track types including U-turns, S-curves, spinning windmills, and centrifugal funnels for endless creative possibilities.
• 【STEM Learning Benefits】Develops hand-eye coordination, logical thinking, creativity, and color/shape recognition skills through hands-on construction and problem-solving activities with easy-to-follow assembly instructions.
• 【Interactive Family Fun】Features simple, medium, and difficult building modes suitable for both children and adults, promoting quality parent-child bonding time and collaborative play experiences.
• 【Gravity-Powered Action】No batteries required - marbles roll, spin, and slide through the track system using gravity alone, creating an engaging physics demonstration while children play.
• 【Modular Design Flexibility】Stackable transparent tubes and colorful bases allow for height expansion and complex pathway planning with adjustable release mechanisms for controlled marble flow.

Specifications:

• Material: ABS Plastic
• Assembled Dimensions: Approximately 33.8 x 45cm
• Recommended Age: 3 years and up
• Power Source: Gravity-driven (no batteries required)