Each track has an opening that gradually widens from one end to the other.
When placed on this opening, the ball perpetually falls forward, transforming the force of gravity into a unique form of propulsion.
Using this principle and the easy-to-stack risers, young engineers are able to build endless variations of kinetic fascination!
Includes:
-Step-By-Step building guide with 4 cool models!
-Base grid to build on for stable towers
-10 Unique tracks!
-Catcher stops runway marbles
-Topper
-55 risers to build 10 levels
-Five quality stainless steel marbles!
