"The Kids Lego Duplo YouTube channel adds a whole new dimension to this toy, our son, now almost 4 has had this toy since he was two, didn't give it too much attention until we recently found the train on Duplo's Youtube channel with an annoyingly catchy song to go with it! now it has become a hit, the only unfortunate part, we seem to have lost the one black kitty cat that should be sitting on the train."