How to Conduct Research for Writing Children's Books
Become a storyteller.
A great way to understand how children in your target age group think is to read a book to them and then have a question-and-answer session.
You can do this with children who are as young as three or four years of age, depending on how verbal they are and how accustomed they are to speaking in front of other kids (preschoolers are ideal for this kind of exercise because they love to raise their hands, give their opinions — often in great and meandering detail — and listen to themselves speak to an adult who actually cares to hear what they have to say).
Or you can pick older children, such as tweens or teenagers — whoever you think your target audience is, the actual bodies that fall into these age ranges are the ones you need to be getting information from.