Today I witnessed a mum and dad letting their two young children (probably about 8 and 10 years old) swim in the North Sea - one clad in a bikini! Yes, it was relatively mild today, but the water was freezing (I tested it with my hand). The parents were wearing thick coats and the mum even had on a woolly hat. They only had one hand towel for the girls and they encouraged them to run around for ages only in their swimming costumes. AIBU to think that's crazy?! I'm all for experiences and 'toughening up' children, but I think that was irresponsible. Children are less able to regulate their body temperature.