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!
-Step-By-Step building guide with 4 cool models!
-Two base grids to build on for stable towers.
-18 Unique tracks!
-Two Catcher stops runway marbles
-90 risers to build 15 levels
-Ten quality stainless steel marbles!