http://eslkidsworld.com/Interactive%20games/Grammar%20Games/Conjunctions/conjunctions%20game.html  Use this if you want detailed skills and facts.

http://www.eslgamesworld.com/members/games/grammar/wheel/conjunctions_wheel.html This is good for studying conjunctions and other things. 

http://www.what2learn.com/games/play/43884/  You will find basic facts about grammar here.

http://www.eslkidsworld.com/Interactive%20games/connectives%20quiz.html  This is a quiz.