brio 33834 smart tech engine w/tunnels

BRIO -- Smart Engine with Action Tunnels -- Choo-Choo! The locomotives are more alive than ever. Depending on the tunnels, the battery-powered Smart Tech Engine will stop, back up or blink its lights. The Smart Tech Engine with Action Tunnels starter kit is based on interactive smart technology that sets you off on your travels, and you are the decision maker!