A soundboard that lets you generate background noise by mixing together a variety of looping sources, from the mundane and useful ("I'm calling you from the coffee shop") to the purely hypothetical ("marching band vs zombie apocalypse").
I'm a big fan of cultural true crime — it rarely actually involves a crime, but it does feature the sort of obsessive fact-finding that feels like outright wizardry, weaving together a historical cloth from the thinnest of threads.
Maybe you know someone who is into modular synthesizers and have feelings about all the patch cables and apparently random knob-fiddling. If that's the case, proceed with caution as this browser-based programming language levels up the abstraction.
Everyone loves the Office Dog, and is giving it snacks in secret.