Get some of the containers from Walmart or target, that have icepacks. My kids love hard boiled eggs, cucumber & grape tomato salad, rolls of lunch meat with cheese, leftovers in a thermos. You can get a good quality thermos in the camping aisle. Also, give them a little salad bar, with their favorite toppings, fresh fruit. Also, not exactly primal..but close, Kit's organic bars (made by Cliff) They only have 5-6 ingredients, my kids think they taste like fudge. I've done chicken and egg salad too... Really need the ice pack for those.