For a project I made a lot of very tiny robotic butterflys.
They move there wings at rondom intervals and 16 different patterns.
Needed to build a custom body to house the attiny85 and a stepper driver. The actual body is really small. The chips are stacked and soldered without pcb.
The butterfly is about 10cm including the wings.

Footage of the build can be found here:
https://youtu.be/fjzpVRE4u5U

The full schematic and code can be found in this video.

The wings moving are pretty realistic.

The butterflys are used in this indoor "forrest" project.
https://youtu.be/03B3D-uORFs

Creality

Ender 3

No

No