The building block toy enables kids to create different maze ball tracks on their own, which brings endless joy to children and keeps them busy for hours. This is good for cultivating kids creativity and improving logic thinking and hands-on ability.No fixed shape, kids can create models freely. Easy mode, medium mode, hard mode - they can create different marble shapes as they like according to their age range. Parents can also share the assembly fun with their kids!Educational Toy . This construction toy set comes with an easy assembly manual, kids need to think about the track direction, the shapes, and assemble it. All can help them develop hand-eye coordination, logical thinking, creativity, color and shape recognition, spatial imagination ability.Safe Marble Set for Kids. This building toy is made of solid transparent ABS, absolutely non toxic, not easy to break or snapped. Smooth edges avoid scratching hands. Pieces stay tight, not easy to get loose when play with it!