Fish Tank
-starts out empty and what ever fish you catch you can place in it.
--depending on if the fish tank is small, medium, or large, depends on how many fish you can have in it

Astroscope (indoor)/Personal Astroscope (outdoor)
now i know these already exist, however i think they should be changed slightly,
-when you interact with them you should be able to see the stars at night and the sky during the day.
--at night when you look at the starts you should be able to see constellations, not earth ones but primal ones, outlined forms of them.