I'm fairly new to the model railroad community (although I did have some HO scale trains when I was alot younger). I've just completed a track in my three-year old's room, on a shelf about a foot below his ceiling. My brother got him an O-Scale "Thomas the Tank Engine" kit and he's loving it! Basically, I have two questions. Firstly - it came with a simple Lionel transformer that works great in this situation. No frills, e.g. Reverse, etc. I'm installing a switch where he can just turn on the train and it goes, and I'm putting the transformer up high and out of reach. I've also acquired some accessories, such as crossing signals and beacons, and was wondering how to power them. Is there a simple transformer (on/off) I can use to do that, instead of replace the train transformer with a more sophisticated model? Also, I'd like something that can reproduce a steam whistle, and maybe even the locomotive sounds (chug-chug-chug). Any suggestions? Thank you!