What you'll need:
*Some Glue that works on both fabric and plastic
*"Wiggly Eyes"
*Sewing Supplies
Open the front pocket and sew with the white all the way around the teeth. just a simple up and down stitch will do the trick.
Zip the pocket closed and then move the eyes around until you find a position you like. Follow the directions on the glue, but most will say to apply it to both materials and then press them together.