So I saw this awesome idea on Pinterest. Make an ice block with dog toys and treats in it. I was upset when the link associated with the picture didn't work so I decided I'd put my college education to use an come up with my own process.
First I got out my silicone cake mold. Then I filled it with tap water and placed it in the freezer. After an hour I checked and there was a thin layer of ice on top. So I broke a dog bone in half and placed it so part of the bone was sticking out. Then I let it freeze all the way.
Once it was completely frozen I took it outside with my dog. I peeled the ice out of the cake mold and placed it on the ground.
And the results are... A nice outside treat that kept my dog busy for 20 minutes!