There's an Argentinian Startup (Atomic Lab[0]), founded by Gino Tubaro[1], that has been giving away fully 3D printed prothesis to childrens for several years now. It's a very cool project! sadly I can't find much information in English and their site is very minimal, but beleive what they do is awesome.

Here are some articles I found on them:

https://apnews.com/article/health-science-ap-top-news-latin-...

https://www.fordfund.org/shaping-new-dreams

Limbs project FAQ: https://www.facebook.com/notes/1035463880210146/

[0] https://www.atomiclab.org/ [1] http://www.ginotubaro.com/ (In Spanish - no HTTPS) | https://emergeamericas.com/agenda/speakers/gino-tubaro (no official but in English)