Take a juggling ball and wrap a tissue or piece of paper around it and cut off the excess.
Trace two plates, with a marker on the brown fabric for the inside of the pouch brown. Trace only the largest plate on the blue fabric for outside of the pouch.
Put your outside piece on the inside piece with the side with circles. Sew them together on the outermost rim. Do not finish the circle, but leave a small area open.
Sew the outer rim again and tuck in the hole that you left open. Sew it close. In the fabric. Approximately 1cm x 1cm, it's for the rope to go through.
Sew some lines around it to prevent it from tearing. Now take the rope at least as long as the circle, if you want to be able to open the pouch completely. Pull on the ropes to gather the fabric and close the pouch.