Hello everyone! I haven't ran a train since I was a teenager, but now at 32 I've decided that I would like to take on the hobby again. This time around I have some resources to actually do something. I have always liked steam driven anything, but I have a question on trains. I always see a series of numbers with the trains, 0-4-0 or something similar, what does this mean? I've tried to solve this on my own but with out getting to a hobby shop, (going this weekend) I'm lost. My guess is that it has something to do with the wheels. Am I close? Is there a good book out there with the terms I will need to know. Thanks for the help!