I'm always amazed by 3D printers! Here's a collection of things I've 3D printed with flexible/movable parts.
Printed on my Prusa I3 MK2S with various PLA filaments from Matterhackers, Proto-Pasta, and Solutech.
Gear Bearing
https://www.thingiverse.com/thing:53451
Articulated Butterfly
https://www.thingiverse.com/thing:2810756
Cute Mini Octopus
https://www.thingiverse.com/thing:3495390
Predator Action Pliers
https://www.thingiverse.com/thing:2949649
Kobayashi Fidget Cube
https://www.thingiverse.com/thing:1790624
Flexi-Dragon
https://www.thingiverse.com/thing:3505423
