I listened to a webinar today about summer reading. One of the suggestions was to use Padlet as a live summer log. Here the students could post their thoughts about what they were reading and the teacher periodically would comment. I’ve made one here you can try (here’s the link). One of the nice things about Padlet is the ability for comment moderation (so nothing goes public until you approve it! (That's the feature I've used here.)
In addition to the summer, this might be a fun way to provide a voice to kids during the school year. While I allowed a name for each post, you can make it anonymous.