If you don't know what they are... they are a short table, made just for trains. They are ALWAYS in the way, and made for trains only (with sides on the edges which prevent you from using it as a regular table). That are at a perfect height to give you bruises in your shins when you walk into them in the dark, and they cramp the train building style of D.
If you don't want to take up space, or you want to have a table you can also use for coloring, Toppah crafted this alternative at the request of my creative Aunt L who was building with D and wanted something to get things from the foot locker to the floor, a ramp of some kind.
Toppah used scrap wood (he is a cabinet maker... so there is plenty around). He made the "track" for the track just a smidge bigger than the train track.
That's it. It is easily stored (under the couch, in a closet standing up, etc) and it is very versatile. It is also used as a race track for two matchbox cars, it's a bridge, a hill, and a launching ramp, a slide for little people, and a bridge on which to build lego houses.
It is a huge hit with all the boys - and cleans up in a cinch!! We extend ours (see below) with some pieces of cardboard :)