Photography, history, and stories from all my treks plus crafts, antiques, art, and much more...
I'd come in, see everything wrapped, and say, "Oh boy! Santa came! I wonder what I got?"Then I'd start unwrapping each thing and say, "Aw, I already have one of those!" :(
What a good idea for the Scrooge in your life!
I have seen office cubicles done like this, but never an apartment.