Encourage your little one?s imagination with the BRIO World – 33873 Smart Tech Engine Set with Action Tunnels from the Swedish toy specialists at BRIO. ? 17-piece set. ? Arrange the action tunnels to watch a new train adventure unfold. ? Features BRIO Smart Tech? for unique play interactions. ? Interactive technology allows you to stop the train, honk the horn, back up or blink the lights. ? All Smart Tech? pieces are compatible with each other. ? Mix and match with other train set pieces from BRIO (sold separately) to build a custom town for a unique play experience every time. ? Includes: ? 3 x Action tunnels. ? 1 x Conductor. ? 1 x Platform. ? 1 x Track block. ? 1 x Engine. ? 1 x Train Carriage. ? 8 x Curved track pieces. ? 1 x Direction changing track piece. ? Suitable for ages 3 years and up. ? Requires 2 x AA batteries (not included). ? Conforms to the safety requirements of ASTM F963. ? CE certified.