I think Nue want to see if Rinnosuke's skill can overcome her seeds or something. But instead of using it, he is trying to guess by other random means...
The artist probably don't want to mess with something as abstract as this, since either Nue's ability to hide the item identity or Rinnosuke's to find out it's name and general purpose have the 'same chance of winning'
It's a radio. Not only you can listen to music, news, and stories it may be able to play your cassette and or CD. Plus, with nowadays technology, it is installed with digital clock that served as both time-teller and alarm clock.
Also, throw it hard at someone and you got yourself a projectile weapon. Some sharp edges it got there!
Hmm... Since it can play music, is it a recorder? But there are lots of items that has multiple functions on itself... It's silly of me to think it's a thing that only plays music...Now that I think about it, it could be something that's out of my imagination... There are lots of items developed from brand new ideas out of the common knowledge what we perceive up to now... I, too, am impressed by these ideas, and should try to go to the outside world eventually...Hey, you can grasp what the name of an item is, right? If so, do you know what this is?I don't give a damn about that!!Since when am I an appraiser? It has an angular shape... Is it a computer or a TV? But it makes no sense to base the idea solely on shape... It's quite a common method of evolution to change the set shape of the past to something completely different...