My brother is going to be 18 soon. We siblings decided to buy a present together so that it can be something bigger for this special birthday (ideally for under 100€), but we have no clue what to get him. My parents don't know what to get for him either because when asked he doesn't wish for anything at all. They're probably going to give him money, but that's not something we can do too.

He doesn't really need anything for his hobbies (playing computer games, trumpet and climbing) as far as I know. And he doesn't give any clue whether there's something he'd like to have that he doesn't want to spend money on himself. Although there has to be because he never spends money on anything.

At this moment I'm desperate for at least some suggestion in which direction to look, because I have NO clue. Thanks for looking!