Three-year-old Jason knew where Nana kept the snacks. Whenever he went to her house, he ran to the kitchen, opened the cupboard beside the fridge and took out what he wanted. This particular day, his older cousins were also visiting, following him round the house and generally "looking after" him. When he helped himself to a packet of crisps, bossy, ten-year-old Clara suggested he ask his mummy first.
Running back into the living room, he asked, "Mummy, can I have a packet of crisps?"
"Maybe there's something you should ask Nana," she replied, implying that he should ask her permission as it was her house.
He promptly ran up to Nana, missing the point entirely, held up the crisps and said, "Open it!"