How to Conduct Research for Writing Children's Books
Go back to school.
Lucky for you, many teachers are open to having writers come into the classroom. Just be sure you check in with the front office before you start wandering the halls. You may need to sign in, and you may be accompanied by a school representative.
Being around children at school is the perfect research venue. You can make the experience active by leading a project or volunteering for an arts and crafts activity or game, or you can simply lurk passively in a corner and watch and listen.