Harry and the Dinosaurs Go to School by Ian Whybrow
It's Harry's first day at school. He and his dinosaurs are very excited and perhaps a little bit nervous. But when Harry's dinosaur friends don't join him in the classroom, Harry's not so sure he's going to like school, but the dinosaurs come to the rescue and Harry and his new friend learn just how much fun school can really be! This is the ideal book to prevent first-day-at-school nerves.