I did this for a contest on Etsy. It was really easy and turned out so nice.
Here is what you need:
-Fabric scissors, 6 6-inch squares of flannel, embroidery floss in different colors, 2 cotton squares of fabric that are 6-inches with a fun pattern, 2 chenille squares that are 6-inches, needles, material scraps in the theme of your choice.
Here is what the cover looked like.
You can use a machine but I hand stitched everything. Stitch the front and back covers the same way. Put the cotton and chenille facing each other and stitch together with a back stitch or some other tight stitch. Leave room on one side to turn rightside out. Then turn them right side out. Fill with Polyfill and stitch up the hole you left. Then you can stitch around the edges if you like for a little extra flair. I have a million embroidery books I have gotten at thrift stores. They are really easy to follow. I taught all these stitches to myself.
Then you embroider material scraps onto the flannel squares. I like to iron the edges down and then sew it on. It makes it easier. I also bought a disappearing fabric pen so I could embroider words well.
When you have finished two flannel squares sew them together like you did the front and back covers.
Then you just hold everything together and stitch down the edge. Easy stuff.
--Mary