http://www.yourdictionary.com/ YourDictionary is owned by LoveToKnow Corporation. Includes word games and audio pronunciation for most entries. Though it is a privately held company, the content is drawn from the American Heritage® Dictionary of the English Language, 4th edition, –Ologies & Isms, and Webster’s New World College Dictionary, Rogets II: The New Thesaurus and Webster’s New World Roget’s A-Z Thesaurus.
http://www.sciencenewsforkids.org/为孩子们的科学新闻. News articles, science fiction books, science fair ideas, and science games. Publication of the Society for Science & the Public.