Look for a bird cage that opens up from the top so it's easy to put succulents in. It was also nice that the bars were far enough apart I could have the Calico Kitten succulent hang over the edge of the bird cage.
Start by soaking your sphagnum moss with water. Take a small handful and place it on the bottom of the birdcage. If you want to make sure it stays put, use some floral glue to adhere it to the birdcage.
Once the moss is in place, add your succulents!
I decided to add one more succulent to fill the bird cage more. Close the lid once you have them all arranged and you're done!