Certainly we are all affected by what we see on the media. we are programmed to believe what we hear and learn from it.
Children are the easiest to manipulate as their brain hasnt fully developed. Therefore, if it's "the coolest thing around" it will truly be the coolest thing around.
There is no getting past this fact of life. Think of advertising as a trial and error move. if something is truly "the best", try it out, see if that statement is correct or not, and act accordingly.