I like pranks. I like them especially when played on someone who also appreciates a good prank.
Thought I would share a pic of a prank from last year on a coworker. It wasn't an April Fools' prank, but in honor of a special milestone birthday. Take a peak:

I foiled her office. Hehehe.
Here are some other prank ideas:
-- Tape down the phone hook on a desk phone, so when the person picks up their phone to answer, it will keep ringing!
-- Leave a phone message to call Mr. Lyon. Put the phone number of the zoo on the message.
-- If you have creamer or milk in a cardboard carton in the fridge, drop in some food coloring!
-- Rick Roll someone!
((I love a good Rick Roll. Don't know what it is? Click here: http://www.youtube.com/watch?v=oHg5SJYRHA0))
Later skater,
J