The Cabin; as with the undercarriage there is a 6mm steel plate for base and weight, although that might have been a bit much but that's what I've got so that's what I'll start with.
Other than that, it's just a bunch of plastic with some screws, dollhouse hinges and magnets.
IMG_20230501_214023_7 by [url=https://www.flickr.com/photos/185289350@N06/]Benedikt Bj. Kristj