Perhaps less properly referred to as Home Decor Made From Recycled Materials. Some parts could be from items that are no longer used.
Can be started from redecorating the walls of the room, without the need to paint. Can take advantage of good wallpapers and modern patterns
Or large frame, can be made from a used board placed a photo or image
Or put a pot in the room. Similar to expensive house houses, there are usually plants that require minimal maintenance
Or use the photo frame at the guest table, so as not to look messy. Can be placed book or fruit (if have)