Not if you keep rewarding your kids for eating slop: http://www.nytimes.com/2005/03/17/health/17obese.html
I think Santa Clara county's plan of banning toys from some fast food kids' meals is a wonderful excuse for politicians to meddle in our personal affairs.
Now, we just gotta get parents to to stop using the "we'll go to McDonalds if you. . ." line so kids will stop connecting that grease sensor on their tongues with the reward center in their little brains. De-Pavlov their little behinds, I say!
Oh, and I've thrown in a link that'll take you to an excerpt from the book, Fast Food Nation, just for good measure: http://www.rense.com/general7/whyy.htm