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 travel around the outside of the colored blocks on their way to the bottom. It looks cool, and it extends run time. Marble runs are one of the best building toys for building spacial awareness. Although sometimes challenging to build, each marble run successfully constructed provides loads of exciting play. WARNING: CHOKING HAZARD -- Toy contains a marble. Not for children under 3 yrs.