I've been out of the writing loop for a bit, but I heard about this free recurring writing contest. One of the prizes is a 10-page critique from an agent. The theme this time is middle-grade fiction. The deadline is tomorrow, but it's worth a shot: http://www.writersdigest.com/editor-blogs/guide-to-literary-agents/11th-free-dear-lucky-agent-contest-middle-grade-fiction