Below are some games to sharpen your time skills!
http://www.oswego.org/ocsd-web/games/BangOnTime/clockwordres.html
http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/timetables/index.htm
There are lots of different games here: http://www.maths-games.org/time-games.html
Remember, if you find a good game, don't forget to share it!