Build the bridge into your existing layouts and enjoy driving over and under the bridge

BPA-free - Exceptionally safe for baby

Each sold separately

Features magnetic couplings for easy connection to other BRIO sets

dream up adventures

Brio Adventure Tunnel 12x optical zoom Build the bridge into yourSee what you discover when you pass through the 33481 Adventure Tunnel. Shaped and colored like a mountain railway tunnel, this sturdy plastic and wooden toy is finished with a realistic stone effect surface and colorful 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 interlocks