I tried again and got the same response!

Mike.

OK... on Wednesday, I sent an email to Kimberly Clark asking for the Cars cards for my son. I received an email back saying sure. In the mail yesterday was an envelope from Kimberly Clark with all six of the Cars cards!

What email address are you guys using?

I've tried two different ones with no luck at all.

I emailed to the address on the web site. Now mind you, my email was well-crafted. I spent some time telling the story of my son's efforts to potty train and his love for the movie "Cars". And how we had used Huggies diapers since he was a newborn (true). And how we had looked for boxes with cards in them with very little luck (also true). I even said I might send in a picture of my son in the pull-ups with the cards.

Honestly, I was surprised that they sent the cards, based on the lack of success of others.