This is one of the best present a child can receive on their 21st birthday. It will take at least a year to document and a few thousand rmb for a camera and another few k for printing and binding, however, that will depends on the number of pages, copies required and complexity. Nevertheless, it's all worth the effort because it will be priceless. And I definitely recommend this to mom-to-be. Start writing!
I will be designing one for my mom's birthday. I know she'll be so happy and the best thing I can give. Memories.