Holiday time!

Extra practice:
http://www.perfect-english-grammar.com/question-tags-exercise-1.html
Some games:
http://www.eslgamesplus.com/tag-questions-game/

Extra practice :

http://www.perfect-english-grammar.com/wish-exercise-1.html

http://www.englishexercises.org/makeagame/viewgame.asp?id=4294