FANTASTIC TOY -- Assembling a marble run with colorful pieces together, help kids identify a variety of colors, master building blocks of the structure of space, to improve children's creative thinking ability, operational ability through playing. GUARANTEED SAFETY -- The marble maze toy is made of solid ABS, safe, not easy to break, and the smooth edges to avoid scratching your hands. It is an Interactive game. This set of building block toys comes with a simple assembly manual. Children need to think about the direction and shape of the track and assemble it. Gifts for family playing together. HAVING FUN AND LEARNING -- The building blocks toys provide hours of active fun and learning. The exciting Marble Run building block toys are equipped with cool parts! In addition, they teach children logic. The innovative games with basic physics and fine motor cultivate problem-solving skills for children. SATISFACTORY GUARANTY -- Our products are all brand new and they will surely meet your requirement but if you have any problems with them, you can feel free to contact us and we are happy to solve them for you at any time. MULTIPLE APPLICATIONS -- The building block toys are suitable for family, preschool, and kindergarten toys, birthday gifts, Christmas gifts, etc. They are suitable for early education toys for 3 4 5 6 7 8-year-old boys and girls.