Brio 33973 Smart Tech Sound Action Tunnel Station | Wooden Toy Train Set For Kids Age 3 And UpWhen used with the Record & Play Engine (not included), the Station Action Tunnel instructs the train to slow down to a complete stop, flash its lights to signal that its arrived and play a station sound to create a playful ambience. Once the train has halted, help the passenger onboard the Travel Wagon and begin your BRIO World journey.