I think it would be cool if there were model kits of the vehicles in the Fallout games, probably in 1/24th scale with details you don't normally see in the game like openning doors hood & trunk, detailed engines, interiors & undercarrages etc.

Also think models or fully articulated action figures of Robots, creatures & power armour from the games would be cool, probably in 1/6th or 1/4th scale, 1/12th scale for the really big creatures & robots.