Looks like the toy is plastic, but you can print and make ones out of paper (or cardstock?)

Seems about as violent as foam noodle swords?

Well, that makes them like the edge of a freezie pop. Those are dangerous.

I don’t think plastic would cut so well as it does in the article’s video, but maybe it’s not the only schematic.

Like a butterfly knife

Ah your right I didn’t have audio at the time I first watched the video.