How to make a 2D origami ball (balloon)

(page 4)

5th picture of 2D origami ball (water bomb)

05.

Apply the vertical "gate-fold" of the step #4 and then unfold.

Prepare to apply four horizontal "valley-folds" and then unfold.

6th picture of 2D origami ball (water bomb)

06.

Apply four horizontal "valley-folds" of the step #5 and then unfold.

Prepare to apply four vertical "valley-folds" and then unfold.