I'm not a fan of Thomas the Tank Engine, but I get a lot of their stuff cheap at open-air markets here in Mexico. And they make all their tracks incompatible, so you have to buy a new set of tracks every time they change the trains a little.
They make a high-quality battery-powered set of locos that require a special track, and that track is no longer available in Mexico. BUT, a large department store managed to get a bunch, and within a week, only two overpriced boxes were left.
There is more track than my lay-out can handle, and I'm taking everything down next week anyway (to set up my Christmas display.) But I spent a couple of pleasant hours moving stuff around to get a small set-up--the Thomas tracks are blue, with orange switches.