I'm a congenital amputee who just got my first 3D printed prosthetic arm. Ask me anything!
This is the video of my experience unboxing and trying on my new 3D printed prosthetic arm for the first time: https://youtu.be/2C2be985R8c?t=265
I grew up either not using a prosthetic at all (depending on my mood or activity) or using what's called a "Myoelectric" -- a very basic, single motion prosthetic arm which costs on average (without insurance coverage) $15-25k each. Not practical for growing kids who need a new fit every 1.5 years!
I'm 33 now and hadn't used prosthetics in the last ten years until Unlimited Tomorrow developed and sent me (and many others) their prosthetic that's been under development for the past 6 or so years. Their mission is to create an affordable prosthetic device/process so that kids can grow into new prosthetics as they grow. (See unlimitedtomorrow.com for their story.)
https://imgur.com/qW4py41 *proof it's me!*