Hi Gena,
welcome.... evaluate all the pros and cons as you research, and decide what will work best for your needs....
My advice to anyone new to chickens is to get either hens or started pullets. (that isn't so easy, I think the demand exceeds the supply). Most people don't want to let go of their laying hens or POL pullets.
Chicks are cute and cuddly and need a lot of care. If you are only getting 4, it is a little difficult to get just 4 chicks. .
From hatching to 6-months or so of age you won't get any eggs. It is very exciting to get your first eggs, but six months would probably seem like a long time to your children. (If getting fresh eggs is one of your objectives). So all the work and no rewards unless you would see them as purely pets.
Some of the sellers on Criags list are expert chicken raisers and you can get good birds that way. I would suggest a started pullet that is approaching point of lay (POL) or a young hen that is already producing eggs. You would probably do well to get most or all of your birds from the same source, and near the same age.
Conversely some of the sellers are trying to dump birds, or the birds are not well cared for and you can get problems. But raising chicks can also present problems.
If you take the raising chicks approach, you may be required to get more than you want, and then who knows, you could become a person on craigs list....selling chickens. ;O)
I got chickens from Craigs list, 1 hen who is amazing and two pullets who were within a month of laying. I don't think the seller realized that there were some health problems with the chickens, but I believe that i have those all cleared up now. If I had bought from a breeder who advertised on craigs list, I would have probably not had any health problems with the chickens..
Bottom line is that chickens are easy to take care of and make good pets. Some are very docile and friendly, and yes raising the chicks does contribute to that, but it isn't the only route. My birds think I am the walking grocery store and come running to meet me when ever they can---or just mosey over now and then to see if any treats will be forth coming.
let us know what you decide and how it turns out.