A truly mesmerizing marble-track experience! Each set is made up of hollow stacking cubes and a variety of perfectly flat tracks. The paths cut out of each track widen almost imperceptibly from one end to the other, creating an invisible slope that propels the marbles forward. Watching them go is like magic in slow-mo! Explore more with the 73-piece Builder set with four guided builds. Get creative and discover the wonders of simple engineering with Trestle Tracks. Unique marble run with marbles propelled by widening tracks Encourages spatial reasoning, creativity, engineering skills, problem-solving Tracks suspended by hollow stacking cubes Builder set features base grid for added stability Follow guided builds or invent your own structures! Builder set includes 1 catcher, 1 topper, 55 risers, 5 stainless steel marbles, 10 unique tracks, base grid All sets are fully compatible with each other - Collect them all! High-quality materials and construction - Lasting durability Ages 8 and up
