Ruth, the inventor, uses her skills to help fix a broken bridge on Sodor by creating a brand new – that walks on its own!? Motorized plastic Thomas engine activates the Walking Bridge when it boards?. Track layout allows for continuous play without pausing to reset?. Thomas is able to travel from one side of the bridge to the other by using the Walking Bridge or by activating the lever to reveal and lift a trap door. Walking Bridge activates with any motorized engine (engine must not have attachments – i.e. tender, cargo car)?. Engine and track compatible with all TrackMaster and Wood tracks to create limitless adventures! ?