I have four kids and have found that their tastes have widened over time to include most foods so there is hope at the end of the tunnel! My suggestion would be to stock up on a variety of foods and things that could be broken down into parts. So in a survival situation, you wouldn’t be serving the same things everyday for weeks which is good advice all around. When my kids were young, they wouldn’t touch a casserole with a ten foot pole, but they would eat the individual parts if served seperately. Also, hunger makes the best sauce!