• Marble run construction system made of high-quality wood. • Includes 102 pieces in total: 51 construction elements, 50 marbles and accessories. • Features sound effects thanks to its three hanging bells and transparent stairs. • Stimulates the development of coordination, problem-solving and spatial thinking. • Versatile design that allows multiple assembly variations and configurations. • Compatible with other marble runs from Hape's Quadrilla line. • Educational toy recommended for boys and girls from 4 years old.