“You wanna see something cool?” Ben asks, a twinkle in his eye and mischief in his voice. He’s met with squeals of delight as a half dozen seven- year-olds clamber along a giant downed tree and crowd around him. Ben holds a strip of decaying bark, which he tilts forward to reveal its underside, speckled with a white-web-like substance. It’s a cacophony of “Woah! Cool!”
“What is that?!” “Let me see!…