I wouldn't be doing my job if I didn't stress the need for your child to keep reading over the summer. It could be a book they want to read but is a little beyond their reading level. Reading it aloud as a family would be a great way to enjoy it. Or perhaps they are ready to try a book they didn't get a chance to read in literature circles. I've included a link with some suggestions for good books for 4th graders. Take a look at it and see if something peaks their interest. Take some time to relax and enjoy the summer, but it would be a good idea to go on ReadTheory or Newsela a few weeks before school and get their brains thinking like scholars again.
Have a great summer!