The Thomas Wooden Railway offers little engineers a rich world to discover and explore as they re-create their favorite Thomas and Friends adventures. A comprehensive, open-ended play system from Learning Curve, the Thomas and Friends Wooden Railway System will also help develop physical, social and cognitive skills, as well as a sense of accomplishment. Thomas and Friends inspire your child to believe that little people -- like little engines -- can do big things! Every one of Thomas' friends has an important job to do. From pulling cargo to loading scrap, these engines know the importance of teamwork in getting the job done. Iron 'Arry and Bert are distinctive diesel engines with a design all their own. Together, they measures 6.5 inches long.