Get more spinning and more surprises with this deluxe Quadrilla 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. STEM

• 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