Instead of scanning the website for valuable information, I soon found myself taking all kinds of quizzes. Mulitple choice, crossword games, spelling tests complete with audio, and re-writing passive sentences turned into a fun session. On the spelling tests, a correct answer brought up an animated happy face. A wrong answer, showed a person rolling a stone up a hill.
Another grammar website for kids or for those who need a better grasp of the fundamentals, is Fun Brain. The animated characters were cute and encouraging.
So, if your prose is littered with misspelled words, adverbs, and too many adjectives, and your eyes glaze over when someone talks about verb tenses, maybe it's time for a refresher course. I'd be interested in your experiences with grammar faux pas.