Since "this little piggy" is meant to be a kind of slow, gentle toe-by-toe tickling, what if you up the ante?
1. You could make it a bit rougher by trapping the person's foot in an arm lock and just pulling at each toe in order at first, of course singing "this little piggy" with each grab. Then do it out of order after a few turns with no warning after a couple rounds. Of course, this is done slowly. So some may be stuck giggling at this stage, like the normal one. And others may just smile, not finding it to be too much to resist. Making them try to anticipate where your fingers will strike next is helpful. Just hang at the end of one of t