It is important to know about parts of speech so you can write good papers and it is just fun to know. (nouns adjectives adverbs etc.) Here are some games to help you understand what they are.
http://www.gamequarium.com/partsofspeech.html
http://classroom.jc-schools.net/basic/la-grammar.html
http://www.englishclub.com/esl-games/match.htm