We describe processed foods to our 3 year old as traps (sugar being addictive) and we are the “(real) food detectives”. Not that anyone wants to deliberately harm kids but that it’s not the manufacturers job to ensure we’re healthy and that a lot of people don’t care and/or don’t know and it’s our job to know and make the right choices for us.
I think it’s useful for them to know that their parents (and later them) are in charge of their health, that that’s within their control, and that they can learn as soon as they can read what real ingredients are and ditch the rest. Fake food doesn’t get inside our home.
Part of the reality of the world you live in is that being in good health is not given, and it’s not even easy without a whole lot of learning.
Wild nature has its dangers and so does the free market led by flawed people.
Knowledge is power.