My mental picture goes back to when I hiked the West Highland Way. I was sitting on a bench in a car park on the edge of the lake when a BMW car parked almost in front of me. Mum and Dad got out with two 8 to 10ish-year-old children. They opened the boot and all started to put on what looked like the very best and bright clothing, hats, and boots. The children wore green wellies. They then wandered down to the water's edge walked to the left and right, maybe 100 yds in each direction, the kids then ran around for a while and mum and dad stopped to admire the view. After all of this activity, about 20 mins later, they all strolled back to the car, undressed again, Mum folded everything neatly in the boot, and off they drove.