I #arduino custom keyboard that i use for twitch streaming. Now with 3mm black acrylic casing! I got some crap on my blog for having the final product as just a circuit board.. Similar to a Raspberry Pi the case is up to you. It's personal. Unique. I'm only adding a case just to show one possibility. link how i made it is here - https://www.s-config.com/arduniodeck/