WolVol Big Train Tracks Set Toy for Kids with Upper and Lower Level, Tunnels and Bridges, with Battery Operated Racing Train and a Real Working Traffic Red/Green Light (with sounds) Real working traffic light, put the blocker down and it will change to Red, Blocker up will change it to Green Light Battery operated train, power on and let it go on its own. Make sure to insert the battery the correct way so it should go forward (inserting battery the opposite way, will make the train go backwards) Easy self assembly train tracks and pieces Hours of fun and entertainment for the train lover Requires 3 AA batteries for the traffic light & 1 AAA battery for the train (not included)