Office Sound Level Meter
Wall "art" that assesses noise levels in my office and provides a colorful visual representation of those levels.
Working from home I noticed that the wall behind me (that happens to be in every video call as well) was pretty barren and needed something. I also realized that I had a habit of talking on mute and it dawned on me that I should create something that's not only a combo of nerdy and colorful but that also made it easy to identify that I was talking while on mute. Not gonna' lie, but it also made it easy to point out to the kids how loud they were being when were sharing an office space for a school-year.
Obviously not an all-inclusive list, but enough to give you an idea on the parts list if you had any intention of replicating something similar.