Need to attach 3D printed parts? Rather than use pins, pre-made rivets, or machine screws, you can make quick and easy plastic rivets with a couple inches of filament from your 3D printer. I've been using this technique for a while now, and finally made a quick video showing you how on my YouTube channel Barb Makes Things.
The little creature in this video is one I wrote up a couple years ago, and I haven't yet written an instructable for the scissor mechanism poking device I show in this video. Let me know if you're interested in seeing that.