Leave No Trace can sound like a rulebook for purists, but stripped back it is just good manners applied to wild places — the same instinct that stops you dropping litter in a friend's garden. Taught early and lightly, it becomes second nature for children rather than a lecture.
Pack it in, pack it out is the headline and the one children grasp fastest. Everything you carry in comes home with you, down to the apple cores and the orange peel that people wrongly assume will vanish. A dedicated rubbish bag clipped to a pack and a small competition over who spots the most stray litter turns it into a game rather than a chore.
Stick to the path. Trails exist partly to concentrate the wear in one place, so widening them to avoid a puddle or cutting a corner does more damage than it looks. Walking through the mud rather than around it keeps the wider ground intact, and good boots make that an easy sell.
Give wildlife and other people room. Watching an animal from a distance rather than chasing it for a photo, keeping voices down near others who came for the quiet, and leaving flowers, stones and feathers where they lie all come under the same simple heading: you are a guest here.
None of it is complicated, and that is the point. A family that carries out its rubbish, stays on the path and keeps its distance has covered nearly the whole ethic without ever opening a guidebook. The reward is a trail that looks exactly as good for the next family — which, on a busy weekend, is the whole idea.