They are super simple to make and a great project for a young sewer. They can also be a simple wallet or pouch if you don't have a need for tooth pouch.
To make the tooth patches, I used Ultra Heat-n-Bond and white muslin. Back a piece of white muslin with the Heat-n-Bond and then cut out your tooth pieces. A friend also suggested sticking on the pouch with spray adhesive.
Time to Make the Pouches:
Fold the strip of felt in half. This way, the kids only have to sew up 2 sides. Some of mine got fancy and sewed up the long ends so that the fold was at the bottom while others just sewed around 2 sides so that the fold was on the side. Either way is fine.
It was a bit hectic sewing with 16 kids at once, so no sewing pictures were taken! We did pre-thread about 20 needles which made things go much, much smoother.