HIGH-QUALITY AND SAFE: This marble run set comes with many high-quality, non toxic blocks.  The blocks are smooth, rounded, and have no splintery edges. This set provides bigger balls that are a hollow plastic. 
COMPATIBLE WITH ALL MAJOR BRANDS BLOCK: Designed with the kids who love innovation in mind, our marble run set is compatible with all major block brands. 
PERFECT EDUCATIONAL TOY: This engaging learning toy 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. It can improve imagination, curiosity, problem solving, creativity, and shape recognition.
BEST GIFT FOR KIDS: With this perfect marble run set, it can give your little one endless entertainment and keep the kids away from the screens! Perfect gift for little girls and little boys ages 3+