Little good loco that goes back and forth, there are three positions for the button on top (back stop and front). My 4 year old son is very happy. He was charged several times, no problems to report. If I had to find a downside, I would say the power: the locomotive is not very fast and can not pick many other cars in its wake (although with one it is going well). I do not regret my purchase and wonder if it would not have been even more powerful with batteries (or so would have consumed lots of batteries).
