I modified the design of my model Kissing Cranes Picture Frame and obtained a heart shaped model that is more suitable for Valentine's Day. The model is called Kissing Cranes Heart and this is what it looks like:
If you insert a picture or a note in the center of the model, it can be used as a picture frame or as a Valentine's Day card.
You can find the diagram here. Although the diagram was drawn with two color paper for clarity purposes, I like to fold the model with paper that is the same color on both sides. It's better to use a thin paper.
The model in the picture was folded using a 12" (300 mm) square of thin washi paper. The final model is approximately 6" x 6" (150 mm x 150 mm). The note in the center is 3" x 3" (75 mm x 75 mm).
Please don't forget to leave me your comments.
Happy Valentine! (in advance).