[rahimnathwani]

I think for most adults avoiding a granny knot is enough. But my son is not yet 10yo and he often has untied shoes at the end of the day.

I've even tried tying his shoes myself (so I know both the knots are pulled really tight, and that the loose ends are the same length as the bows). Even so, somehow the ends get pulled hard enough that they end up undone.

(Somehow for him even the Ian secure knot doesn't guarantee a full day without laces coming undone.)