April Fool's Day

look here :
http://www.woodlands-junior.kent.sch.uk/customs/year/april.htm

and here :
http://www.surfnetkids.com/aprilfools.htm

and there :
http://www.learnenglish.org.uk/magazine/magazine_home_aprilfool.html

and send an e-card from here :
http://www.123greetings.com/events/april_fools_day/

look here again :

http://www.lovetolearnplace.com/SpecialDays/AprilFools/Activities.html#anchor428187