A complete stand alone set or can be used to expand on existing run elements largest action set. Engineered so that with enough speed, the ball will continue to roll through. 

Includes: 

• 20 buildings blocks 
• 19 run elements 
• 2 special elements 
• 2 marbles 
• 2 base-plates 

Suitable for ages 4 . Especially intriguing for master builders ages 8-12 years.