The need to define a target audience is the same for every book you write. Whether it is a book for adults or for children, the notion of writing is the same for both of them. If you are not able to define your relevant audience then you will face difficulties in writing content. If you happen to be writing for children then it is needed to define the right demographic for it. A book for a pre-schooler would not work for someone that is in mid-school. Young adults would not prefer a nursery rhyme for children. You have to balance everything out and then decide what you want to write about.

What we mentioned above is something every writer needs to understand. When you talk about a children’s book in particular then illustrations play a huge role in it. Illustrations are mostly seen on the cover of books for adults but in a children’s book, illustrations are used in used in every page or along with every content that you write. Before you commence to write a book for children, research well and decide on the topic you want to write. Once you have decided what to write about, the next step is to find the relevant illustrations for it.

The process of illustration creation is not the responsibility of the writer instead all you have to do is present the idea to illustrators for childrens books and in turn, acquire quality illustrations for your book. Illustrations add a unique and appealing look-and-feel to your book and compel the young reader to read it. If that is what you want or if it is something you want to write then you have to make the most out of the right illustrations. 

Source: 

https://voxillustration.com/category/children/