One more request from my kid, a smaller butterfly in the shape of a katana.

You will need:

4x Screws: 3mm in diameter and 10mm long
4 nuts: 3mm
Video with a small demonstration of the katana in action: 

The initial layer may be challenging, so if needed, decrease the speed of the first layer.

Assembly:

The handles are different from each other. Both handle 1 A and B should be assembled together, and the same applies to handle 2 A and B.
Handle 1, with the blade open, should be placed underneath, and handle 2 on top. Please refer to the image for orientation.

Print Settings: 
Material: PLA
Layer Height: 0.2
Infill: 15%
Walls: 3
Supports: No
Brim: No
Raft: No
Supports: No
Change filament during print: Yes, make your own color schemes :)

Enjoy. If you have any questions or suggestions, hit me up in the comments. And if you wanna support me, give it a like, download it, and share it with your friends. Happy printing!