This smart Big Green Engine is built to last and has wheels that steer! Its sister engine, Big Red (BJT418) combines with Big Green to make a great pair of trusty wooden engines. Magnetic couplings ensure compatibility with all other engines and carriages in the Bigjigs Rail range. Consists of 2 play pieces. Most other major wooden railway brands are compatible with Bigjigs Rail. Made from high quality, responsibly sourced materials.