What's the key point about the craft of 3d pop-up book?

As you know, 3d pop-up book is very popular by children cause it's funny and vivid. But do you know what is the key point for producing a 3d pop up book? Let click the video as follow to find out the answer.

1. It's a high requirement for the large-area hot stamping on the cover and inside pages.

2. It will be more durable and fantastic only with the quality gluing craft.

3. Testing passed for the material makes children safe to play with.

4. It isn't easy to deform for the middle layer when it pop-up.