I hope you don't mind me posting here but just wanted to say....
Today I was shopping with my 2 boys (8yr & 5yr old who is disabled) & I can honestly say everywhere we went we were surrounded by lovely helpful polite teenagers.
They held open the doors, helped my 8yr old reach stuff off shelves as I was stuck behind some rude adults & couldn't steer ds2 around them, chatted to ds2 when we were in the queue & then one of them carried my tray to the table so that I could push ds2.
So i just wanted to say even if they only get out of bed at lunchtime & just about manage to grunt at you, don't be too hard on them because it looks to me like you are all raising perfect ladies & gentlemen.