Playing with trains

Last year, I bought the boys a bunch of Brio wooden train track and a few trains. At the time, they couldn't have cared less. Building tracks was more fun for me than for them, without a doubt.

Well, fast-forward a year, and now they want to play trains. So we built a decent-sized track and had a blast.
Now I need to get some non-motorized engines, since Gabe likes pushing them, not just watching them go around...