Being in a spirited mood, I wanted to make a feisty one.... "go away" was a great greeting that I had to do, while "wipe your paws" has a more functional meaning.
You will need:
Laser cutter / engraver
River rocks that have a good smooth surface
Paint and fine brush (optional)
Sand Paper (optional)
Clear sealer - paint or wax (optional)
If you don't have a Laser cutter / engraver, you could try this with the point of a nail and a lot more effort. A Dremel with a pointy diamond bit works nicely too. Both of these methods are quite time consuming and difficult to get a clean typeset though.
I don't actually have a laser at home either, so I took a class and did it at the Tech Shop in Menlo Park., California.
Thanks Tech Shop for all the cool classes!