I finally have something to share!
My first garden mushroom:
I made this mushroom from concrete then did a mosaic design on the cap. My only complaint is that one of the tiles I used is the exact color of the grout so it doesn't show well. Newbie mistake. Other thing I'll do differently next time is try to get my tiles closer together. I didn't realize that tiling a curved surface is way different than tiling something flat. Though the bottom of the tiles are close together, they "fan out" at the top, leaving way more space between the exposed surface than I'd expected. Using a thinner tile or maybe mosaic glass would improve that quite a bit, I'm thinking.