This set is the classic case of a Verschlimmbesserung. Compared to earlier models, the Duplo locomotive was the automatic Stoppmechanimus "improved" as it says in the description. Unfortunately, this "improvement" means that the set for children under 5 years is hardly suitable. Previously, the engine automatically went out when moving off on objects at derailing or lifting the locomotive - now it runs continuously without stopping - well abgenudelt so long until all the teeth and the drive wheels or the engine has blown.
I really want to know who has invaded this very bad innovation. Since the principle of planned obsolescence has probably struck again. Here you can admire the Lok children of course no longer away, otherwise it would go back immediately! No longer recommended, at least not for children under 5 years, although the age is given 2 to 5 years on the pack.
Previously, I had a very good opinion of Lego, but this set with its "improvement" is a very bad message to the clientele.