Normal kids won’t screamed at chocolate bars and potato chips in the supermarket, but they do if they see them in a classroom because they don’t expect to (Plus my P.3 kids just love shouting and screaming for no reasons).
It’s easy to get kids involved once they get excited. They are willing to think of quantifiers to describe those packets of potato chips and cartons of milk. They can easily distinguish the difference between a box, a bottle and a carton. Of course all these can be done by using pictures and videos, but the chemistry is different. Kids nowadays have got used to images and videos already. Using realia in the classroom surprise them.
Btw, the best part is to share that packet of potato chips after the quiz, even though everyone gets only one piece. 🙂