On the other hand, a book meant for an older, 10-year-old kid would require quite a lot of words, and not necessarily include any pictures. Yet, a picture here and there is enjoyable at any age. As is said, "A picture is more than a thousand words."
Things to Consider
There are two types of children: those who love to read, and those who hate reading, and would rather play computer games, or watch TV. Before choosing a book, or even writing one for little ones, there are a few things to consider.
First of all, it should have an intriguing plot, making it interesting for young readers. A rather rapid sequence of events is preferable. Also, the ending is extremely important; the plot should be entirely solved, without any open endings. It is very desirable for the book to end on a happy note, especially if the book is meant for rather young readers.
It is advisable to start with just a little information, just the essential elements, and something about the main characters: their names, their setting, etc. Avoid too many details that may discourage kids to go on reading, as they get frustrated, not understanding the whole point of the writing.
The Psychological Aspect
A psychological truth about children is that they seem to belong to two different universes. One is the outside world, that is, the real world. The other world belongs to their inner, emotional life, together with their thoughts and perceptions. Books with pictures in them may refer to both these parallel universes.
As kids' inner dimensions are hard to reach, depicting or employing elements of their daily life can help get into their inner, hidden universe.
Children's books should have characters which overcome hardships, and have the courage to live and act according to healthy principles.
In order to possess quality, literature should have a strong teaching element. Good children's books should teach moral issues, ethics, and cultural and religious values. It has become a cliché, that the future of our cultures highly depends on the next generations.
To make a bright, happy future, kids should learn about the power of love, honesty, courage, justice, sympathy towards the others, and choosing good over evil.