they weigh a ton, easily 5x as much as the big cars and they're half as big as the dome cars, and the underside looks the same as the main engine.
here's it in action http://www.youtube.com/watch?v=X6u6HoAS65A this is the longest i got it to stay connected, it broke apart on the next trip, I put the engines from both sets on it, and the 3rd car is the engine that doesn't power up.
here's it in action http://www.youtube.com/watch?v=X6u6HoAS65A this is the longest i got it to stay connected, it broke apart on the next trip, I put the engines from both sets on it, and the 3rd car is the engine that doesn't power up.