• Complete stand alone set or can be used to expand on existing run elements
• Includes two cradle chutes for marbles to shoot off in four unpredictable directions
• Marble may drop from one cradle to next or take an unexpected dive off the edge
• Engineered for continuous rolling with enough speed
• Includes: 25 building blocks, 16 run elements, 2 special elements, 2 marbles, 1 base-plate
• Suitable for ages 4
• Especially intriguing for master builders ages 8-12 years