I think we don't have ads like that because media psychologists like to think up too much to try and convince us to buy things.
That commercial's just fun to watch because you're interested in what those kids are doing. It has no ••••••• thing to do with Cadbury chocolate, but, granted, most people will watch that entire commercial and have some slight interest in eating Cadbury chocolate, though 90% of the commercial had nothing to do with it. No wonder Europe is so much cooler than the U.S.