R.S.
I try to eat a salad every day for lunch, but I always add something with protein. For example, chick peas, beans, hard boiled eggs, etc. This always fills me up without feeling like garbage. I make my own dressing so I am not eating any sugar (most dressings have sugar in it). So I use a little vinegar and oil and some real mayyonaise (miracle whip has sugar in it), and some spicy mustard. If I want it to be a little sweet, I add about 1/4 tsp honey and mix it all together. You can even make this and bring it to the park with you. Sorry I don't have a 3 year old anymore so I can't remember what I used to feed them, but I recently read that you want to mix carbs with protein so it stays with you longer. Good luck!