Just push the lever to start the "fuse" - when it rises to the top the barrel explodes apart revealing a surprise message! Press the barrel down to reset and "explode" the barrel again. You can also tilt the cargo drop to slide the TNT cargo into a cargo car (sold separately and subject to availability). Inspired by the upcoming DVD, Sodor's Legend of the Lost Treasure. Perfect for Thomas & Friends Wooden Railway train sets (sold separately and subject to availability)!