Lego Thomas the Tank
When my nephew visits, he can't wait to hit the train room. One visit, I pulled out the blue tub and went to work.
After ordering some medium blue wheels from Big Bens Bricks, I just had to go all out and vinyl him up. Making the face was a pain (digitally cut, but painfully created line by line in the software and then painstakingly applied by hand...) but I think he looks great.
Still haven't worked out what to do with his rods, as I think they're a little wide, but I'll works something out. Wouldn't mind dropping the wheels under the body a bit more too, but that will require substantial modification of the kinda rare red 80's train baseplate, which I'd prefer not to do.