How to make a paper ball?

Fold the paper as shown above

Cut the edge off using a scissor to make a square shaped paper

Fold the paper along both the diagonals.

Fold along the sides as shown above

Fold along all the four leafs

Fold the edges of the 4 leafs and lock in with the edges of the leafs

Blow air through the top hole and.....

Hooray.....we have a paper ball