if your school is okay, you can give the Pepper or Bruno books as most children this age love it, including my kids. also, you could try giving them activity books that have fun worksheets and come with lots of star stickers that parents can use after the child finishes the activity.
in my child's school, we are only allowed to give story books of the Pepper, Bruno or Peppa Pig series. these are easy to read, have a lot of everyday message for kids and nothing that can be taken in any wrong context.