This one is from that mirror that I broke…

and this one is done out of buttons from my stash…

Aren't they cute! It really is a fun and easy project. If your interested this is a shot of the glue and grout that I used…

I'm sure there are many more options out there but this is what I used this time, got it from Jo Ann's and it worked great. There are easy to follow directions on the back too.
Here's a shot of my switchplates after I glued them. You can see the glue in some spots and that is OK because it dries clear and plus it get covered up with grout.
I was excited about the beach glass one I have here but the pieces didn't end up sticking, either I didn't use enough glue or they weren't flat enough on the side I glued. Bummer. I really like the other two though!

Let me know if you try this. I'd love to see what you come up with!