First cut out all your material. Then place two ear pieces right sides together and sew. Turn right side out. Then repeat with the other two pieces. You should have two shapes similar to the two in the photo.
Place material like this and sew a straight horizontal line across the top.
Fold and sew so you have a gap for your chord. Then repeat steps 2 and 3 with other pieces of fabric.
Once repeated, place ears in position and pin. Sew right sides together (sewing the ears as well)! Remember: Leave a gap for your chord at the top
Turn right side out and using a hot glue gun attach face pieces.
You should now have something like this. Take your chord and run it through the gap you left at the top so that when pulled the bag draws in.