Get more spinning and more surprises with this deluxe Quadrille set. Includes a xylophone rail that plays a tune as marbles run over it, two double-sided spiral twists, plus four special control blocks to randomly distribute marbles. Marble-run with control blocks and two-sided spiral twists. The knob and button on the distributor block can be used to change marble direction. The different colored see-saws send marbles in different directions. Endless possibilities for reconfiguring the layout. Suitable for children over 4 years.