I used to work in marketing child talent for acting, modeling, dance, and music. When my baby is born, I'll probably put him/her out there to get some gigs. My sister was an infant model. It doesn't pay very well. It's just something fun for them to do. If you are interested in learning about the industry PM me.
My daughter was "discovered" while we were shopping one day and I went and talked to them. She offered to "represent" her and I went home to think about it only to discover there were TONS of complaints against this company, so I decided against it. Just remember to reserch the companies and IF they are truly legit and believe in your child, they WON"T ask for any money up front. Those places are scammers. Period. Even if they offer you lifetime picures, which this one did. :) They didn't get a penny of mine.