Yep, that map is pretty cool. Austin, we had almost exactly the same experience. He was getting frustrated putting the train back on the tracks, so we wound up getting some battery-powered engines for his wooden train set, about the time we bought a slew of special track pieces on eBay and elsewhere. I bet he'd love the G-scale set even more now... will have to dig it out.
Striving to increase my rate of flow, and fight forum gloopiness. sick