Jump aboard the ultimate Smart Tech Sound experience. The 33977 Action Tunnel Deluxe Set features 91-pieces of railway fun including highlights from our interactive Smart Tech Sound range. Travel around this large wooden track layout by train, bus, truck and explore all the areas that BRIO World has to offer - from the peaceful countryside farm to the action-packed lift and load station. Then take your railway adventures to new heights with the amazing Smart Tech Sound Record & Play Engine and Action Tunnel accessories - hear your voice and other programmed sounds play out from this battery-powered train as it drives around the tracks and interacts with other Smart Tech Sound toys with lights, motion and exciting sounds.