BigJigs Wooden Railway Car Carriage BJT442 Two piece set includes a car carriage and a small detachable car that is held on by magnets. With wheels that steer, the engine goes around curves smoothly. Magnetic couplings ensure compatibility with all other engines and carriages in the BigRigs Rail collections. Most wooden railway sets are compaitble with BigJigs Rail, making BigJigs the perfect choice for starting or expanding your collection. Made from high quality, responsibly resourced materials. Measures approximately 3 1/2" long. Ages 3+.