Hi my name is Adrian and I started doing model railways a month ago. I chose O gauge and I run Lionel fast track since it is very capable to find. I'm ready to expand my railway but I don't know how to. I own a 120 volt transformer but I don't think it can run two trains at the same time since it came with the Polar Express set that I bought.  I want to run two trains at the same time because I see lots of people doing it and I don't know anyone else who does model railways since I'm only a teen and my friends think it's stupid but I don't care what they think. Can any of you guys help me out? Thanks