Links
Here is the list of pages and associated forums I usually visit for latest happenings among 3D printing enthusiasts (in no particular order):
https://miscsolutions.wordpress.com/
https://forum.e3d-online.com/index.php
https://groups.google.com/forum/?hl=en&fromgroups#!forum/deltabot
https://www.hubs.com/knowledge-base/key-design-considerations-3d-printing/
For Reviews and general 3D trends:
Thomas Sanladerer’s youtube channel: https://www.youtube.com/user/ThomasSanladerer
Shopping links (apart from ebay and amazon):
https://duet3d.com/index.php?route=common/home#products
https://www.dold-mechatronik.de/
Repository of 3D printed parts:
Educative links for kids:
https://www.hp.com/us-en/shop/tech-takes/3d-printing-glossary