We did some jokes too - in the computer classroom we replaced the PC mice's balls with paper ones, and on every paper there was a message: You april fool! And of cource the standard "your back is white" and "your knees are dirty on the other side" and so on. And also our classmate, a very cool girl, came in a short skirt. So we lifted it and did some photos of the very nice 'content' with the mobile phone's camera.
i didnt do much BUT i had a can of coke in my bag, so i drank it carefully by popiing the tab thing only slightly and then filling it up with water. Stuck it in the fridge and my sis drank it...
Also another crap one, we told my dad his friend was on the phone but he really wasnt. YOU SHOULD HAVE SEEN HIS FACE HE TOTALLY FELL FOR IT!!! WE WERE CRACKING UP ALL DAY, WE WAS HEAPS MAD!!!
"Hey look youve got two elbows! HA! April FoOls you fool," my friend. wat i d!ck.