Rewrite and Edit Children's Coloring Book

I'm looking for a good writer/editor for an African children's coloring book. I need ideas to improve the written content of the book and to make it much simpler in grammatical structure for a target audience of 3 - 8 year olds. The word count is currently 1,178. Research on African tribes will be required, therefore an African or Black writer is very necessary. Timeline is 7 days max.