I brought this for my children and we have sat and read it a few times. I was hoping that the 21 activities would be interesting for them, but they are not really things that kids can do easily. the text is quite sophisticated and there is a lot of it. We have looked at , and talked about the pictures which is nice, but I don't think this is the intention of the book.
There is one illustration in the book which I had not seen before which shows the foetal stage of lots of living thinks from humans to birds and it is amazing how they are all almost identical