Every Hape Every Quadrilla marble run is different and provides a combination of a great mix of spins, drops, seesaws, and speed that will have marbles going every which way! The Cliffhanger includes three gutters that make your marbles around the outside of the colored blocks on their way to the bottom. It looks cool, and it extends run time. As with every Hape Quadrilla Marble Run Construction Sets, it combines easily with other Hape Quadrilla products for expansion and unique combinations that will enhance your child's play experience. Develop Your Child’s STEAM SkillsThe Hape Marble Run has been designed to stimulate your child’s understanding of the STEAM (Science, Technology, Engineering, Art and Mathematics) principles. It will greatly improve your child’s logical and engineering thinking.