• HIGH-QUALITY AND SAFE: This marble run set comes with so many high-quality block. which is absolutely non toxic. Besides, the blocks is smooth, rounded, and no splintery edges. This set provides bigger balls which are hollow plastic rather than glass to protect your little one from danger. At Toy Life we put the safety of your child as our top priority. • COMPATIBLE WITH ALL MAJOR BRANDS BLOCK: Designed with the kids who love innovation in mind, our marble run set is compatible with all major brands block. Your little one can use all major brands block to build various models to enhance children's creativity and practical ability. • PERFECT EDUCATIONAL TOY: It's a very engaging learning toy that helps with problem solving and attention to task. It's fun for a variety of ages. It is perfect for your kids, because there are hundreds of ways to put the blocks together, so every time is like playing with it for the first time.