The moments before teenage inhibitions kick in are the last ones of childhood and a great stage of life to photograph. Once the child crosses that line they're keen to put away childish things and a photo like this becomes impossible.
This shoot was enormous fun. The family were in Scotland on holiday from Sussex and when I arrived, the kids were down at the loch swimming. The obvious thing to do was to get the cameras out, start working and let the shoot unfold before me.