The models in the picture are folded from 4" (100 mm) squares of origami paper that is the same color on both sides.
To fold the hearts, start folding steps 1 through 15 of the Kissing Cranes Heart (see the Diagrams page), skip step 16, and then shape the corners, at the top of the model, as shown in step 17.
You will end up with a plain heart that has four center flaps, as shown in the picture below.
The center flaps can then be folded in different ways to create many patterns.
In the next post, I will explain how to connect the hearts into groups of four (with no glue) to create modular flowers with beautiful patterns, like the one in the picture below:
Till next week!