A few days ago my 18 month son got a delightful children's picture book version of the Bible. One page with a picture of a snake, next page an apple. You get the idea. (No flaming swords, though.)
It made me start thinking. Why are there so few picture books about natural science? So I decided to make one.
The book is freely available in PDF format.
I have also made a version of the file with the pages suitably arranged for printing as a booklet - print the file double-sided on heavy stock paper, bunch the pages together and fold them in the middle.
I hope you and your child enjoy it.