They're interesting things, I have the greenhouse one from (I think) the same maker as [USER=22510]@hobbyknife[/USER] 's little street. It's mostly laser-cut MDF with some plastic sheets, stickers and plastic parts for the more 3D elements, plus some LEDs, wires, battery pack etc. for lighting. It was fun to put together for a change, though I don't think I would recommend it for someone who's never really built anything ever before (which does appear to be part of the target audience).