Keyboards have replaceable keys. You probably don’t think about it a lot if you just have one of the cheap ones that comes with any straight of the box computer. People who spend money on their keyboards have been aware of this for a long time though. Clackeys is the company that makes fun, personalized keys for your keyboard.
These keys come in a variety of different types. There’s a Companion Cube for those who love Portal, One Eyed Willie for those of that will never die and a bunch more. They work with a few different keyboard types so see if yours is on the list.
They come primed but you have to paint them yourself which would make a nice craft project for anyone who needs to something to do. The concept is nerd-tastic and will definitely mark your keyboard as yours. Orders are currently closed but they are set to open back up this month. Check out the site to sign up for updates.