Looks very nice! Haven't jumped the Polar Express shark yet. I'm weighing that against the Hogwarts Express shark. My feeling is that Hogwarts might be of more interest to older kids or teens, whom are old enough to actually get into model railroading of their own accord. I got serious about model railroading sometime around the 5-6th grades, that was over the Summer between 5-6th grade. My Mom got me a subscription to Model Railroader for my 12th birthday, in 1974, about when Bruce Chubb's layout was featured in the MR 40th Anniversary issue, in 1/74.
Getting back on subject, how about a Polar Express S-2 Turbine?