Rokenbok RC Tower Crane (Retired Rare Version) 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: Recommended Age Range 6 to 12 Years.