WriteOnCon.com is a free online kidlit writers conference that will be held Aug 14-15.
Fromm their website:
During the conference, keynote addresses, agent panels, and lectures are presented as blogs, vlogs, moderated chats, webinars, podcasts, and livestreaming. There is also a critique forum, where participants can post query letters and writing samples to receive helpful feedback and comments from their peers and industry professionals. And, as if that weren’t exciting enough, there are also daily contests, giving random winners everything from books to personalized critiques from agents.