Bird bath- I used a flower pot base
Caulk and gun- GE silicone
Tile- I used old dishes, just make sure you don't use the rounded rim pieces
Tray to mix grout in
Float or other tool to spread grout
Start with the fun part: smash those tiles! I put mine in a plastic bag and whacked it with a hammer. Make sure you wear safety glasses in case a shard flies out- they're sharp!
Attach your tiles to the birdbath using the silicone caulk. I applied the caulk in a squiggly line on the bottom of the tile and held it down for a few seconds which worked just fine. Don't put too much on or it will squish out the sides when you press it onto the base.
Grout! I mixed up just half of the bag of grout and it was still way too much so if your project is about the size of mine consider using even less. After the grout was thoroughly mixed, I used a paint scraper to spread it over the tiles as it was smaller and easier to maneuver than the floats I found. Wear gloves!
Because you have to work pretty quickly before the grout starts to set, uncovering some of the smaller tiles proved to be a little tricky. Next time I would probably avoid using really small pieces to guarantee the same effect after grouting as before.
Find a base for your birdbath. You can pretty much use anything as the base as long as it won't tip over.
I like the rustic look of wood so I found some driftwood at the beach and just sawed off the ends to make them flat. I put my birdbath in the garden so I was able to bury almost half of the base in the ground for stability.