Friends of mine have young children who go to a school where all teachers keep a blog. The parents love it because it gives them insight into their kids' day in class.
My friends used to ask their children "What did you do today?" and they usually got a shrug in response. Now they say: "I saw that you had a big art activity at school today" and the kids eagerly engage in conversation about the details.
Anyone else have examples of blogs that engage parents?