Imagine his surprise when he realizes something's not white with his morning cup of milk. If your child thinks he can't be fooled, think again. Imagine his surprise when you stuff his favorite pair of shoes full of toilet paper. It won't be long until you're summoned to see just how much his feet grew overnight! Another great idea is to get your child in on the act. Help him play a good-natured prank on Pop. The best part of waking up will be playing this trick. Swap out the sugar with salt and watch as dad gets a tart start to his morning. Be sure to have a back-up cup on hand. Or why not place a post-it over the tracking ball of his computer mouse? Sign the note "April Fools."