READ – As with any other kind of writing, the best piece of advice we can give to you is to read. Read a lot. In fact, read as much as you possibly can. The more you read of your chosen genre, the more you’ll get a feel for what’s popular, and for the right kind of writing style as well.
CONSIDER YOUR TARGET AGE RANGE – Children’s fiction is split into several different age groups, ranging from ‘board books’, primarily aimed at babies (ages 0-3), to full-length novels for young adults (13+). You need to know precisely what ages you want your book to appeal to in order for it to be successful.
THINK PICTURES – If you are writing for young children, pictures are a must. This does not necessarily mean that you have to illustrate your work yourself (although you may want to!), but it does mean that you will have to learn to think visually as well as verbally. If scenes are hard to picture, or if they cannot be translated into straight-forward images, children could lose interest in what you are trying to tell them.