Magnetic Building Blocks Car Track Set, 46PCS STEM Learning Toys for Kids Age.. STEM Play with Racing Adventure QBI Magnetic Blocks combine classic building fun with exciting racing play! This 46-piece STEM toy set includes push-and-go inertia track cars and magnetic cubes to create ramps, loops, and arenas. Perfect for kids aged 4-8 to explore spatial reasoning, motor skills, and creative thinking through hands-on play. Multidirectional Patented Magnetic Design Each cube (1.97 inch) features QBI’s patented multidirectional magnets for secure attachment at any angle. Kids can build vertical towers, spirals, or custom stunt tracks. All QBI sets are interconnectable-expand the fun and build without limits. Great for solo or group activities! Certified Safe & Durable Materials Made from high-quality ABS plastic with fully sealed magnets, QBI blocks meet global safety standards: EN71 (EU), ASTM (US), ST (Japan). Rounded edges, non-toxic paints, and sturdy construction make them safe for everyday play. No small parts-designed with child safety in mind.