A puzzle to assemble in the shape of a 3D dragonfly
Once you print the sheet you have to break the thin tabs that hold them together and then you can assemble them as a puzzle. If you need a cheat to figure out how to put the pieces together correctly you can watch the assembly animation.
Disclaimer: You may need to adjust the horizontal expansion in your slicer setting to make the pieces fit together correctly. I've already added a bit of a gap margin in the STL files, but results may vary depending on your printer and filament.