Beery, who has taught Leave No Trace in the US, thinks having an outdoor code of ethics is a good thing, but he also believes that it needs to allow children more freedom in their interactions with nature. “Of course if we’re talking about an endangered species that has a very fragile habitat, that’s a place where we don’t play. There are places where we don’t build our forts. That’s a given. But I think we’ve started overusing the idea of Leave No Trace in the context of children’s play spaces in nearby nature.”