The Santiago Flower Ball is an origami model by Mette Pederson, the well-known creator of the Mette Rings. I must say I love this model! It looks rather like modern art I think. Little Miss insists that it looks like a lantern and has been using it as one! If you hold the model by one of the flowers, it actually does resemble a lantern :)
I had used printer paper, which was perfect for folding it. There aren't a lot of folds, so making the individual units was quite simple. 4 units are assembled together to form the flower (blue and peach in the picture). 6 such flowers are needed. Then the 6 flowers are held together with 12 strips.
The paper size I have used is 3 inch squares for the flowers and 3 * 6 inches strips for the connector units. The resulting model is roughly 6 inches in diameter.
Model Details:
Model: Santiago Flower Ball
Creator: Mette Pederson
Book: Mette Units 7
Author: Mette Pederson
Difficulty Level: Low Intermediate
Paper Ratio: Square / Rectangle in ratio 1:2
Paper Size: 3 inches squares and 3 * 6 inches rectangles
Model Size: ~ 6 inches in diameter
Modules: 36
Update: The design is also found in the Origami Tanteidan 10th convention book.