My five-year-old, Jacob, is a master of sleight of hand and deception. There is nothing he enjoys more than savaging an unsuspecting mark with a brutal practical joke. Well, as long as the target is okay with it. And, even then, it’s good to take precautions to avoid any unnecessary mess or inconvenience. It’s important to take a paper towel or two along just in case there’s a mess that requires immediate cleaning up.