Miniture Thomas Train Track

My son received some miniature Thomas train engines as a gift. These are smaller than the standard Brio and whatnot that run on the wooden tracks. I don't know what type of track they are supposed to run on. It appears that the track has some sort of T-bar in the middle so that the train stays on the track.

I figured if he had some train engines, he needed a track to run them on. Rather than looking into purchasing proper tracks, I decided to print them. I looked on Thingiverse and did n