Northwestern Oil Express 22 Piece Battery Operated Toy Train Set w/ 4 Train Cars, 12 Curved, 4 Straight Tracks Northwestern Oil Express 22 Piece Battery Operated Toy Train Set 4 Train Cars, 12 Curved, 4 Straight Tracks Tracks are Easily Attachable, Fun Music and Realistic Train Sounds! Easy Hinge Action to Attach Cars, Stimulate your Child's Imagination Requires 2 AA Batteries to run (not included)