Covered switchplates, of course, have been around a while, but this method is perfect for using up your fabric scraps, and it doesn’t require folding any fabric around the back of the switchplate (ergo: it’s perfectly safe).
The process described on Tiny Décor is so simple and intuitive—and their instructions so well laid out—that you could probably knock out a few of these in a rainy afternoon. We're not suggesting that you attack every switchplate in the house, but in more casual spaces, like kitchens or kids' rooms, why not? A little paste, a little Mod Podge (oh, the glory of Mod Podge), and voila!
More photos and a helpful tutorial here.