I can’t find where I folded the model from, but I really like it. It’s very simple, but the form is right, it stays closed because the front heart locks into the far one on the top. You can open it and write your message inside, or use smaller paper and spread them around your loved ones.
Jeremy Shafer published a youtube tutorial for this flapping butterfly card. Paper: 35 cm double-sided paper from origami-shop.com (don’t try smaller paper on your first try). And yes, the butterfly does flap its wings when you pull on the sides of the card :)
The skeleton hand is found in this video tutorial. Paper: 15 cm kami. People like this model a lot, it’s especially popular around Halloween :)
Both models are high-intermediary. They’re not in his books, but he has many other amusing models to fold :)