Here is the origami tutorial.
You might say that it is too complicated for a first try but you can find cranes and boats diagrams everywhere on the web. I thought that ball is more original.
It can be a decoration, you can make some kind of mobile with a few balls.
I hope my explanations are clear and that you’ll succeed in making it.
1 | take a square piece of paper and fold in half vertically and horizontally.
Make diagonal folds to both corners.
Then fold the edges to the central line.
2 | Fold top left and bottom right corners to the central line’s opposite corners.
3 | Turn those corners down the pieces of paper like in picture 4.
5| Turn the piece of paper over and fold the corners to diagonal line in order to make a square.
Repeat those 5 steps 11 times.
6 | Put the pieces together by 3 like on the pic.
7 | Put the groups of pieces together by 2.
8 | Associate the 2 pieces.
9 and 10 | Turn the triangles down in order to close the ball.
Your turn !