There is no doubt that commercials influence every aspect of our daily lives, so they can be an effective media technique. Commercials tend to consolidate reality, simplify reality into very black and white categories. Commercials tend to exaggerate, manipulate.
Commercials tend to use symbols.
There are many other dangers when it comes to commercials, and it is very important that a youth group not accept commercials as valid communication devices and feel that by just changing one word, that the entire meaning will change. Christ is it. But because most people hear commercials all the time, it can be a lot of fun to allow your youth group to make some commercials for God, Christ, or the church by adapting popular commercials, or by creating entirely new ones. Give the kids enough time to practice and gather together whatever props they need. Then have the groups present their ideas to each other one at a time.