In order to use pieces of embroidery for ATCs, I first iron double faced adhesive to the back. Then I cut them out to the desired size - the adhesive holds the stitching threads secure so they don't unravel. I peel off the paper on the other side of the adhesive and iron them onto pieces of wool felt which serves as their backing. I finish them up by blanket stitching around the edges by hand. Voila!
The whole time I was working on these, Sheldon's lullaby from The Big Bang Theory keep running through my head:
Soft Kitty, Warm Kitty.
Little Ball of Fur,
Happy Kitty, Sleepy Kitty
Purr, Purr, Purr
Now they are finished I hope I will be able to get this song out of my head!