Well, I would take them and collect them.
They are 11 and a bit (in Y7, goes to and from school on buses with friends, shopping locally and is fine in the house on own for an hour or so) and 9 3/4 (goes to shops for me, occasionally left on own for half an hour or so in house) and vey sensible, usually.
I sooo can't face 2 1/2 hours of Harry b*** Potter.