I've worked in the film and commercial area for a long time as a producer. Do not respond to ads that say oh, we can get you seen...because it really is a bunch of bull and usually you will be out money. Rini was lucky and did her research that they were in Southern California...honestly...do you really think they would advertise for something from Dallas if their main office is in the state of gorgeous children?
Now to get your children seen locally (I'm talking Dallas here) - take pictures of your baby and submit them to the name agents in your area...If you are in Dallas, Linda McAlister, Clutts Agency, The Campbell Agency, Kim Dawson Talent. Go to their sites, read up on how to handle submissions, and do it! Once an agent accepts you and when a submission comes through for a print ad, it will go to the agent and you will be asked to attend a casting call - this is for print and commercials.
Also, look on your own as Rini suggested - locally owned and operated retail stores will sometimes do their own ads or pictures for their stores. The worst that will happen if you ask is that they will say no.
Good luck and feel free to contact me offline.