Here are some links that might help you

http://www.eslcafe.com/

http://www.kidsdomain.com/holiday/thanks/games/diff2.html

http://www.kidsdomain.com/holiday/winter/games/diff.html

http://www.activityvillage.co.uk/printable_activities.htm#Spot the Difference

http://www.eslcafe.com/search/Games/
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My son was in your country with his German Class this past June
(toured 4 countries in 16 days) and he absolutely loved it.

Happy Holidays!!