Beans, sunbutter and oatmeal will be your best friends
For breakfast we do:
Soy yogurt plus cereal. My kids really like the cinnamon and vanilla flavors of Kashi whole wheat biscuits (like mini wheat cereal).
Oatmeal. There current favorite is either sunbutter or peanut butter with dried cranberries. I always add ground flax meal to oatmeal.
Snacks:
Apple slices sprinkled with cinnamon and sunbutter to dip apples in
Celery sticks, sunbutter and raisins
Whole wheat ritz crackers topped with sunbutter, a banana coin and a sprinkle of cinnamon
Graham crackers with soy yogurt
Graham crackers with sunbutter spread and strawberries
Whole wheat tortilla shell, spread PB all over it, add a banana and roll it up.
Mini rice bowls (cilatro lime rice, brown rice, mexican rice, whatever) and beans.
Beans and pepper strips
Beans and tortilla shells or tortilla chips