Just saying because nearly every person I know who has ADHD and/or Autism (including myself) seems to care less about people knowing they're into "childish" things.
Also the idea that this is a new phenomenon because Millenials and older gen Z are "soft" or stunted in some way.
I mean, boomers have model trains and and cars. So did their parents. My grandma used to knit herself plushies. This isn't new. You don't suddenly stop having your old likes because you reach a certain age.
You'll have a lot more fun if you just wear the boater and walk around like it's completely normal answering any questions about it like they're the weird ones, "Where's yours? Did you forget it at home?"