My DD 4.5 likes to write her own books. We fold paper over and then she writes and illustrates her book. She gets to use her imagination, practice writing, and work on spelling. I'm trying to get her less focused on spelling things right than on the story itself. She can sound many things out, but often will ask how to spell something. We just got a workbook that she loves: The Mailbox Science grades 2-3 100 comprehension building activities. She reads the passages (all science) and answers the questions. She hates regular workbooks but likes this.
Sometimes the best thing you could do is find playmates, but I know that isn't always easy. We go to library programs a lot, and also look for inexpensive nature center programs etc.
Good luck.
