BIG CLOCK ideas
looking at the picture can't tell what everything is?
like the big black object on the right (I think it's a battery??
for add ons what about a beer alarm. calculate how long it takes to drink a beer then have alarm set so LOYL can fetch it.--lol
for real what about in puting some weather data like outside/inside temp. wind speed, wind direction, etc.
am assuming this is going into your living room?
add a differential thermometer. compare the outside temp with inside temp. then calculate the energy efficiency of your house.
something different.