I bought this for my 3 year old son who is obsessed with Thomas and the Trackmaster collection. He absolutly loves the day of the diesels film, so I got him this train, along with Den, Dart and Bell. Its still great fun like all previous trackmaster trains, and is fantastic for any child who loves playing with trains. I think its great for developing imaginative play too, as he now makes the "diesels" and "steamies" role play and talk, and we've painted an old box to make a diesel works. He absolutly loves diesel 10 and takes him everywhere. The only criticism I would have is that he requires a C cell battery, which I have to replace every 2-3 days, but this is probably because my son literally plays with him from the moment he gets up to the time he goes to bed!