Gift idea

So my partner is a 1:1 support for a 16 year old lad who is autistic and has ADHD. He wants to get this kid something for Christmas as the school has a big push for gift giving this year however my partner is a little clueless of what to get him because he's very wealthy and it's a private school. Does anyone have some affordable gift ideas that a lad of that age would appreciate but won't break the bank? I know he's into Fortnite, Drama/Theatre, Drawing.