Game:
http://www.eslgamesplus.com/passive-voice-past-passive-esl-grammar-sentence-activity-fun-game-online/
Guess the sentence in pairs:
http://www.slideshare.net/rethinkingeducation/game-passive-voice-simple-past-10625757
Basketball Game:
http://www.eslgamesworld.com/members/games/grammar/basketball/active%20vs.%20passive%20voice/active%20vs.%20passive%20voice.html
More exercises: http://www.englisch-hilfen.de/en/exercises/active_passive/sentences_simple_past.htm
Game/Exercises: http://autoenglish.org/gr.pas.i.htm