Rokenbok ROK Balls Modular- interacts with all Rokenbok Rokenbok is unique. Radio controlled, interactive and expandable. The only RC construction toy. Rokenbok Sharpens Cognitive Thinking, Refines Motor Skills, Promotes Social Skills and Cooperative Play, Enhances Creativity and Brings Families together: Rokenbok is Winner of over 40 Awards. Recommended Age Range 6 to 12 Years.