All Fools' day

http://www.apples4theteacher.com/holidays/april-fools-day/printables/word-search-challenge.html
http://ped-kopilka.ru/shkolnye-prazdniki/den-smeha-1-aprelja/den-smeha-istorija-prazdnika-1-aprelja.html
http://www.kidzworld.com/article/593-april-fools-day
http://www.brownielocks.com/aprilfools.html

http://www.youtube.com/watch?v=rdlGyWwg5rM&feature=relmfu