If you rename KidzTalk, It would still have the same URL (https://www.kidzsearch.com/questions/ That way you would not lose visitors) but you could just rename it to something more catchy kind of like KidzNet. In my opinion, after all of these amazing updates, the product should be re-branded. Also, it needs a better logo.
Another idea: Allow users to rate the best answer to a question http://q2amarket.com/plugins/star-ratings/