New train engines Diesel and Spencer join Thomas the Tank Engine, James, Percy and Boulder for even more adventure fun as they chase each other down and around Sodor.This helter-skelter toy is simple action fun on a big scale and is perfect for young Thomas Fans as they can interact with their favourite characters by opening and closing barriers and putting the engines in different sheds.The engines also make great take along toys and can be pushed along most surfaces when out and about.