Put third unit on it in the same way as first step. (put two parts on the three parts of the two step.)
Put the fourth unit on it in the same way as the second step, too. (put three parts on the two parts of the three step)
Hold the two strings in each hands. Thenpull them and gather all parts together to the center of ball.
When parts gathered like almost round form, tie a string and
Pull them to the direction of right and left. Parts may break off when you too strongly pull it. please do it slowly and carefully.
Then tie up and close it.
Cut the strings at near the center of ball. If you need it to hang or for something, this process doesn't need.
Finished !!
Point
Processes 3-4 of assembling are very hard. These processes will influence shape of the work.
The finish of the work becomes the oval when you make a margin large.Contrariwise, parts will be torn off easily with process 16 when there is not margin enough.