I love making thing for our son. i document most of it at http://madeatthisplace.blogspot.com.au/
Our son has a lot of Lego, especially fire engine Lego.
It was spread out everywhere and we needed to contain it.
This fire station playhouse was perfect.
I added a ramp so the cars and trucks could get up to the top level and garage doors on one side as our house is more like a garage then a fire station.
I used scrapbooking paper on the upper level walls and painted a H on the roof for the helicopter. (or in our case a plane).