About This

• LESSETI 133-Piece Marble Run Set – 103 vibrant plastic pieces (tracks, connectors, supports) + 30 smooth plastic marbles. Endless creative building possibilities!
• Progressive STEM Challenges - Designed with multiple assembly methods (Beginner, Intermediate, Advanced) to enhance logical sequencing, spatial reasoning, problem-solving, and hand-eye coordination.
• Safe, Durable & Easy Modular Build - Crafted from high-quality, child-safe plastic, components are sturdy, easy to connect, and designed for stability. Enjoy intuitive interlocking for frustration-free building and sturdy track creations.
• Guaranteed Child Safety – Rigorously meets US Safety Standards. CPC certified, ASTM F963 & CPSIA compliant. Made from 100% non-toxic, BPA-free plastic. Parent-approved peace of mind!
• Ideal Growing Gift & Engineering Fun – Encourages experimentation and engineering concepts through varied track designs. Size: 17.5" x 22" (assembled height). Fantastic gift for birthdays, holidays, or any occasion.