Children's book - educational - needs creative illustrator

Im creating a childrens learning book.
It will contains shapes, body parts, letters, numbers, colours, animals.
The images can be vector, AI, hand drawn.
Should be colourful, simple enough that children can understand.
Age group is from zero to 3 years of age.

I have attached a layout of the pages.
How the images are laid out can be creatively places, but as long as it there is flow to the book and a similar theme.

From the examples you will see the after a certain point "shapes" are replaced with for example colours or other animals as you run out after a certain number of pages.

I have also attached some AI images as suggestions. Where you can see in some examples the image are separately placed, in some there is a main image with the others around it.
However i am interested in your suggestions, creative look/feel.

I expect there will be a total of 30 pages to do. This includes the front and back cover of the book.

Im an still creating a layout for the book.
Please give an total price , estimate is fine