I feel like for me it would be thwarted by the fact creatine seems to completely mess up my sleep. I don't remember that from when I was younger, but recently tried adding it to my diet and had to bail.
Omnipod for the win. But, yeah, I have a bunch of disposable needles in my kit as a backup.
Even so, travel is stressful. My carry on is full of backup pods/sensors. But now that my insurance is being annoying and only filling a month at a time, I don't always have an extra...
I’ve wanted to make a ribbon mic but haven’t gotten around to it. I’ve seen where people use Mylar emergency blankets as the membrane for condenser mics. The closest I’ve gotten is accidentally having a capacitor in a radio act as a microphone where it shouldn’t :)
I don’t know how niche they are, but a few I’ve done in the past
- 3D printed musical instruments. Print other designs or contribute your own
- lock picking. When you really get into it, you modify locks to make them more of a challenge and mail them to people
- Ham radio is hundreds of sub-hobbies in a trench coat. I’m currently mainly interested in linearizing switch-mode amplifiers, but was doing fox hunting for a bit (radio direction finding), and periodically do POTA (transmitting from parks)
I don’t know what the regulations are in your country (looks like you are maybe in Canada?), but in many countries it is straightforward to get an amateur radio license, and then you can have all sorts of fun (under the rules).
I used an Akai LPK25 with my iPhone (using the Camera Connection Kit and a combined usb hub/dac) and an app called Simply Piano. They make a wireless version of that now that would simplify the setup a great deal. It is a mini keyboard and the keys are quite small, but in my experience it was fine for the beginner stuff (and the keyboard is useful in general later). As I said before, I stuck with this until the app started using keys outside the range I had.
Now, as for "did I proceed with more serious learning" - I alternate though a ton of hobbies. So I moved on after that, though still go back to it from time to time. But I also have other musical interests and it was helpful to those as well.
Also did a lot of music on the commute on my iPhone with Korg Gadget (and Caustic before that). Sometimes with a keyboard, sometimes without.
I used to get so much done on my BART commute. Also learned piano on a little 25 key midi keyboard until the program I was learning from started needing a 26th key.
I'm amused she said they included it "in case somebody out there liked ugly bright red and yellow" and that "the 'Fluorescent' theme was also pretty ugly, but it didn't have a catchy name, so I've never heard anything about it."
Having Google Translate take that into French and then back gave me "The passengers of this jumbo jet, caught in a quagmire resembling an ocean liner, found a happy accident in this chaotic and surprising landing." I quite like both sentences.