A kid is wearing shoes with velcro. So it wasn't sticking so the parent said:
It has come off/come undone. Lemme stick it for you.
And what about asking another person:
Come on stick it back on! (Velcro)
So should "come undone" or "come off" be used? And what about "stick"?
And if someone "unfastens" the velcro, then what will be used by the other person to describe this?
Why did you "unfasten" your velcro?
What will be a more natural way to express this?
Do they sound natural?