Serious Eats - seriouseats.com

I think food habits and taste preferences ARE established when the kid is areound the preschool age. I know a girl who's mm never fed her any vegetables. Now, she's gaining a little weight because she's eating junk food. So, by giving your children food earlier in life can result in them being used to it, and eating it later on. I'm not saying that you have to serve all vegetables and throw away all cookies. I'm just saying that you should try to get her to eat a little more healthier. If she absolutely doesn't, well there is probably nothing else you can do. But you should try.