These are the 3-D printed light switch plates sold by Etsy store 3DPrintingEgg. They're charging $10 for a single switch cover, and $20 for a double or triple switch, although the designs are free to print if you have your own 3-D printer. I just bought a bunch before realizing all the light switches in my house are the circular dimmer-switch kind. Why I didn't realize that before ordering is beyond me, but I suspect it has something to do with having an abnormal brain. See what I did there? I came full circle with another Frankenstein reference. It's like we all just did a barrel roll together. Did you have fun? "You puked on me." And I'm sorry for that, but please don't let it take away from the experience.
Keep going for shots of the double and triple plates.
Thanks to Closet Nerd, who just replaced all his light switches with live wires you have to twist together to turn the lights on.