Tell you what struck me when we were on our holidays (and particularly in Germany): how terrifyingly well-behaved children were in public. Pretty-much silent, with neat hair and clothes. We’d be trying to break up arguments between the two of them, or stopping them marauding their way round public transport (or whatever) and there’d just be eyes watching us the whole time. Then back at the Eurostar there were British kids running amok with exasperated parents trailing behind them.
Mind you, I saw a older German man absolutely lose his shit with his grandson for trying to climb in a fountain. Chasing him round the fountain, gesticulating wildly, moustache bristling with pure rage.
(Appreciate that this is a massive generalisation but I definitely felt much more self-aware)