Thanks for the article Justin, I found it inspiring! I have a 3 year old who is almost beyond diapers, and who is requiring less time to put to bed, which I already see giving me more time for side projects. I've also found setting artificial constraints to side projects helps (to your point #1)...in my case, I set a goal of finishing 6 side projects in 6 months, each taking less than six hours (6x6x6: https://medium.com/design-startups/b602270880fd ); I got a bit stalled at the 5th project after taking a teaching job in addition to my startup gigs, but am still hoping to finish soon (may become 6x16(mo)x6).
My parents are both physicians (though not surgeons); I'm sure they'd be interested in what you are doing, and should be able to connect you with some interested surgeons, please send me an e-mail at eli[at]storied[dot]us if you'd like an intro.
I have a 2-yr old daughter, who is a bit young for this. But she named one of her dolls Isla Baila, which I'm taking as a good sign (either that, or she is going to be into dancing). Either way, looking forward to introducing her to a language like this when she is old enough.
In addition to height adjustable desks, there is some interesting tech chasing this need. Lumoback has developed a bluetooth enabled device to track and help maintain good posture: www.lumoback.com [disclaimer: the founders are friends]