A chest from the Legend of Zelda games where the metal parts of the chest are 3d printed and the main body is made from popsicle sticks. I designed and built this for reddit secret santa 2017.
Video of how to build it:
The hinge mechanism uses some 1.75mm filament threaded through the printed parts.
The light and sound is provided by an Attiny85 (a really small arduino) and I used a old Nintendo DS Lite battery to power it (although any lithium-ion battery will work)
Code can be found here