MARBLEWORKS Marble Run Starter Set by Discovery Toys This Grand Prix Set starts the Marbleworks collection. Design your own super-sized marble raceway! With 8 different exciting marble actions, each new race is just as exciting! Split your track into 2 paths, experiment with the various marble action ramps, and then rejoin onto a single track to determine the winner at the finish line. Built to Last DT quality. Compatible with previous Marbleworks products. Additional MARBLEWORKS Brand Marbles, designed exclusively for Marbleworks Sets, are also sold on Amazon. Made from High Impact Polystyrene (HIPS), which is durable, impact resistant, and produces a glossy appealing look. BPA Free. Understand the concept of object permanence, as marbles travel in and out the tubes. Develop hand-eye coordination and visual tracking skills. Predict which marble will finish first. Dr. Toy&#039;s 100 Best Classic Toys Dr. Toy&#039;s 100 Best Toys Scholastic&#039;s Parent &amp; Child Teacher&#039;s Picks Award