3D Metal “Puzzles” - e.g. Aetherwings (will mention if this one gets bought)

Basically any 3d metal puzzle should work as they all look really cool. On this website the Scavenger one is one of the top alternative options to the Aetheewings but you may check other websites like Amazon for other options as there are other options from other brands (and I’m not too tied to linked brand as I’ve never used them). Generally a bit of simplicity is desired to not be too hectic for design but also have reasonable space in room or future shelf, NO BUILDINGS (too big, no creativity, at least the Aetheriwng is engineering side historic despite its true minimalism).