Ever Heard of Stapling Moss to the Garden Path?

The birds spent the day playing ping-pong with my pieces of moss.

I painstakingly replaced every puzzle piece, but clearly I needed to find some way to anchor them in place. I tried toothpicks, but they keep breaking on me. Necessity is a mother, they say, and after cruising the aisles at the hardware store I finally came up with something that worked.