After a long period of finding entire lunches uneaten at the end of the day, we started asking our kids each day what they want for lunch the next day. While it wasn't the only thing that changed, giving them the choice has definitely had a positive impact on how much food gets wasted and how often kids come home hungry.
This year, I took it a step further by letting the kids "order" their lunches using a visual form on my phone. They absolutely love it!!!
I'm considering building an app to make this easy for other parents to do. If this sounds interesting to you, please consider registering your interest at https://areyouinterested.co/site/Lunchbox-Ninja
I've found involving my kids in choosing what they want packed in their lunches to be really good for reducing waste and improving the chances of them eating at school. They love ordering their lunches using a picture-heavy online form. Using the recently posted[1] AreYouInterested, I'm gauging interest for a tailor-made solution.
[1] https://news.ycombinator.com/item?id=24689091
If not, why not?