LACE DIFFERENT.
Allegedly there are over 2 trillion different ways to lace a pair of 6 hole sneakers (according to Ian's Shoelace site), and on his site he gives you a grand total of 31 of these... That leaves more than 1 trillion, 999 billion, 999 million, 999 thousand, 9 hundred and 69 to go. Should keep him busy for at least a couple of days.