I'm biased. I'd like something "hard science--y" not just biology/animal related. Chemists and Physicists are people too (well sort of, anyway). Maybe with pairs of goggles? Or atoms? Test tubes, etc. Computers, or my new son-in-law's thing, electrical circuits and circuit boards (which is kind of cool because they can be really geometric and colorful)?
I like flowers but my guys are not really excited about them and they aren't into hunting.