No, they cant.
How many kids believe the photoshop pics they see?
Not to single her out, but Kim K is now selling headphones and her pic in her ad makes her look like a character from the sims. This is NOT how a normal human being looks without hours of photoshop work.
There is a reason we use to have laws around advertising to children.. they are too young to understand things.. this is also why you cant legally enter into a contract with a minor.