Brio Adventure Tunnel 33481See what you discover when you pass through the 33481 Adventure Tunnel. Shaped and coloured like a mountain railway tunnel, this sturdy plastic and wooden toy is finished with a realistic stone effect surface and colourful flowers. It has four "real world" sound effects that are magically triggered when a train passes through it or by a simple push of the button on top of the mountain. Open at both ends under brick effect archways, the tunnel