The 36004 Smart Tech Sound Fire Rescue Set is a 41-piece interactive BRIO World railway set centred around an emergency rescue mission. The Record & Play Engine responds to seven Action Tags positioned around the railway, activating lights, sirens, sounds and movement as firefighters race to tackle a forest fire and a collapsing bridge. Elevated track, two Action Tunnels, a firefighter figure and fire-themed accessories create an action-packed layout while showcasing the interactive Smart Tech Sound system.