STEM Learning – Our kids' building toys provide a fun, hands-on educational experience, helping children develop fine motor skills, problem-solving abilities, basic engineering concepts, and critical thinking. Sturdy Building – The waffle-shaped blocks interlock securely with smooth edges, ensuring safe and durable construction. Grows With Your Child – Toddlers enjoy pulling blocks apart, while older kids can build complex 3D structures, fostering creativity at every stage. Safety First – Made from non-toxic, BPA-free ABS plastic, this marble run set meets ASTM F963-17 safety standards for kids ages 3-8. Endless Possibilities – The 66-piece set includes blocks, pipes, marbles, windows, stickers, an example booklet, and a handy storage box for easy cleanup. What's in the Box: 66-piece building set (blocks, pipes, marbles, windows) Decorative stickers Example booklet Storage box with handle