Advert about a biscuit called I think something like Knoffs - anyway mother goes to give boy a biccy - and he snaps it out of her hand. My mother would have given me a good oul clip on the head.
Next one - is Colgate - Girl hanging on a strap on a bus smiling to show the lovely teeth - she makes faces at the little girl who does likewise. Now I think little girl should have been told by her mother to give the "hanging" girl her seat.
I presume the boy snaps the biscuit out of his mother's hand to show how eager he is to get the 'yummy' biscuit, not as a display of rudeness. If the child on the train offered their seat to the toothpaste girl then she couldn't flirt with the bloke right next to her and therefore the whole point would be lost. They're adverts, not etiquette guides.