See the video below for easy assembly instructions and demo video.

To get the “bones” to print, use white filament for the first few layers and then switch to a contrasting colour.  For mine, I printed in PETG with a 0.4mm nozzle and 0.15mm layer height and 15% infill.

I have not tried this in PLA; however, the bend for the finger actuator straps is not severe so PLA may function perfectly fine without breakage.  If you try PLA, post a make and leave a comment to let me know how it turned out.

Even if you didn't try PLA, post a make or just leave a comment and let me know what you think.