Toys and Joys will help you build cool models of your favorite big tools: bulldozers, forklifts, cranes, and many others. They offer accessory kits which include “some” parts, or you can just get the plans. The models feature plenty of moving and articulating parts — turning wheels, moving tracks, lifting buckets, extending forks, lots of realistic motion.
This means there are a lot of parts, and though the project may not be complex, it could be a long one. But it also means I can afford to build Sean a bulldozer.
Construction Equipment Plans [Toys and Joys]