Anyone that tells you that kids don't have preferences when it comes to food is lying to you. Kids are often very picky when it comes to food and they want only what they prefer to be good for themselves. This is why they don't touch any of the greens in their plate and stay away from all the healthy fruits, because yeah they don't find these exciting.
With cookie cutters coming in literally all kind of shapes, you can go crazy with the designs to make items that your kids despise look attractive to them. Once your children start eating these items as normal food, they would drop the bias and would inadvertently be taking care of their own health. This is a miraculous way to help children eat what is good for them and to help them grow up fast.