Children Book Illustrations

We need an illustrator or more for several children books, age 5-6 years.
The books are online ebooks, a kind of books that are the first books a child reads, with only one sentence per page.
The illustrations should be simple, not with a complicated layout, but with the character(s) and maybe a few objects in each illustration.
Each book has 16 pages plus cover. There are many books in the series, but we need a few different illustrations.. Your offer should be for one book.
Some samples of your work is needed.
Kind regards
Jan