This book is like a lot of fun for children who are in preschool. This book will teach children a lot about the church and then solve mysterious clues that the book is offering to them. It might become a challenge for primary children who are in preschool, but it will eventually make a lot of sense to them of what they've learned from the puzzle book and then they might compare it to the scriptures they read and it may increase their testimonies. I recommend this book to be appropriate for preschoolers, because it helps them to learn a lot of fun activities given to them from the Church. You can buy this at Deseret Book as well as Amazon.