Before getting into these, and how you might fix them (hard), you should know that most kids become more picky around two and then slowly grow out of it in their elementary school years. This is sometimes a surprise to parents—your eighteen-month-old eats like a horse, then all of a sudden around two, they start being very selective and just generally not eating much. I have sat at many a dinner where one of my kids has taken one bite and said, “I’m done!”