Tinkertoy Wild Wheels Building SetRecommended Age: 3 6 years old. Create your favorite wheeled builds with the Wild Wheels Building Set! This set comes with 76 TINKERTOY parts and pieces to create some iconic wheeled builds. Build a pull along duck, a wheel barrel, or even build two race cars at once! This set comes with an instruction sheet which provides a variety of ideas for all skill levels. And, as always, the TINKERTOY parts and pieces snap together and stay together for long