During the summer I took two of my grandchildren (aged 12 and 7) to a treetop challenge – rope bridges (some with wooden slats, some a single rope), rope climbing walls and zip wires, suspended high above the ground.

by Lindsay Wittenberg

  Rigged up with safety harnesses and helmets, and equipped with a clear brief from the instructors, they set out on their respective courses. I hadn’t anticipated feeling so anxious myself as I watched them from the ground, and despite the reassuring...