I found the clear glass stones at the euro (dollar) store last week. They are the kind of thing I pick up when I see them. because I know they will always come in handy for something. These are quite large, approx. 4 x 2 centimetres, which is a rare find. Most of the stones on sale are smaller.
I printed the words onto a sheet of Basic Grey 30x30 cm. paper, cut down to A4, to fit the printer. Then I used gel medium to glue the glass stones to the sheet. Once the gel medium had dried, I trimmed the extra paper from the stones and then glued them onto a strip of hessian ribbon, as shown in the photo. (Gel medium again.) Once that dried, I trimmed away the extra hessian. The point of the hessian was two-fold: one, to give a cleaner look and feel to the underside of the stones, and two, to make sure the stones won't damage any surface upon which they might be placed. You could also use felt, as I've done in the past.
So.. if you need a last minute gift for someone, you might give this a try, too.