L.S.
We are all natural/organic too. Trader Joe's has a lot of good natural foods(no artificial colors, no dyes, no preservatives, no chemicals)
Snacks we use are:
nuts and dried cranberries
fruit - especially tangerines
raisins
carrots
soy beans (edamame)
seaweed (nori)
crackers with seeds in them
trail mix made from Kashi cereal in a zip lock
jerkey
cheese sticks
olives
whole, small sweet peppers
We use compartmentalized plastic containers (you can get them at the doller store) and fill each compartment with a different fresh fruit or vegetable.