This Marble Running Building Block Is A Perfectly Designed Educational Toy Set That Inspire Toddler’S Imagination And Creativity To Build A Creative Magical Roller Coaster Fun Set, Well Build Kids Hand-Eye Coordination, Logical Thinking, Color And Shape Recognition, Spatial Imagination Ability, Patience And Problem-Solving Skills To Keep Kids Playing For Hours. Easy To Assemble And Take Apart Various Amazing Marble Race Tracks With Complete Accessories And Guidance Manual, Great For Kids And Family Member To Collaborate Together, Which Can Strength The Emotional Communication Between The Child And Family. This Marble Run Building Blocks Are Made Of High-Quality Abs. Smooth Edges Without Burrs, All Toys Component Used Child-Friendly Materials Non-Toxic And Lead/Bpa/Phthalate Free.