Somethings I've been packing in my child's dairy free lunch. It is always up to you to determine what is safe.
raw fruits and veggies
left over cooked corn on the cob
craisins (dried cranberries)
dairy free crackers
Sun Rype products
Guardian Angel individually wrapped muffins
Thermos filled with left over stew
Sha Sha cookies
dairy free popcorn
Other ideas (not so big this year)
baked beans, in Thermos
hard boiled egg
Note: Not all salad wraps are dairy free, last nights stew may not be dairy free, always read ingredients and be aware of hidden dairy and cross contamination.