The Children's Place is headquartered in New Jersey. While they don't state exactly where they recruit their models from, it could be possible that they seek models from agencies in New Jersey and surrounding states.
You can go through local modeling agencies in your area or you can use online casting websites. There is also Craigslist and online modeling websites like Model Mayhem and One Model Place.
Businesses like the Children's Place use modeling agencies to find child models for their projects and campaigns. The best way to get your child this type of work is to get them signed to an agency that has a child modeling division.
The company does not list the names of the modeling agencies they use. Your best bet is to find out where their headquarters is, which may help you figure out that information, since most companies tend to use agencies that are local to their city/state.
If you cannot find any such modeling agencies on your own, you may want to look into online modeling communities where you can ask for help in the forums or use the casting section to locate these kinds of agencies.
It's a combination of networking and marketing their models. Once an ad agency has a successful/positive experience with a modeling agency's model, it usually results in them going back to that same agency for future needs when it comes to models. Modeling agencies also send out their models' comp/zed cards to local clients to gain interest.
Online. Use your favorite search engine to find modeling agencies in your area. Their websites will offer all the information you need.
Modeling agencies that have a teen models division are typically the kind that companies like The Limited Too use to find new models for their shoots and campaigns. The Limited Too is based out of Ohio, so they more than likely turn to modeling agencies in the New York and Chicago area.
Companies like Anthropologie put out open castings to local modeling agencies in their area so they are not technically tied to just one modeling agency. Whichever agency has the models with the right look is who they will choose to book their models from.
Models that do Forever 21 ads and campaigns are typically hired through modeling agencies. They do not tend to use underage models as young as 14-years-old, though.
With the exception of the top fashion agencies in NYC, LA or Miami almost all agencies in the US represent middle-aged models. If you are working in a small market outside of New York - and even in New York - You need to visit and hopefully sign with as many modeling agencies as you can. There is no single modeling agency that has access to ALL of the work. If you sign with only one or two agencies, you are missing out on a great deal of opportunity. The agencies understand this also - and while they may talk to you about being exclusive - unless they are willing to put a dollar amount on a contract and guarantee you an income - NEVER sign an exclusive deal with an agency. (Trust me - no agency will put a dollar amount on paper.) = United States Modeling Agencies The most up-to-date and complete listing in the web = http://www.joeedelman.com/agencies/agencies.shtml
Companies like Carters don't use any specific agency. They typically hire models from various agencies depending on where their location is.
You should look into agencies that list Delia's as an existing client. Some agencies post the names of companies they regularly supply models for on their websites. You'll want to find an agency that represents commercial/print and/or teen models.