Brio Turbo TrainCrank up the speed with the 36003 Turbo Train the fastest train in the BRIO World railway system Simply press the big turbo button and this battery operated toy train doubles its speed for a 5 second boost The white lights along the side of the engine change to a cool blue as the turbo boost is activated Real life based railway play helps children to understand and learn about their environment in a fun way, whilst also developing fine motor skills.