I built myself a small special-purpose keyboard with two parts: the main part is a 5-key board to control music players: play/pause, volume control, next/previous. The second (and more fun) part is a big blue arcade button that locks the screen. I worked for a while for a federally-funded R&D center where we could get in trouble if we left a computer unlocked and having a big blue button that I could slap as I stood up from my desk helped me stay in infosec's good graces. Now that I'm WFH I still enjoy it.