Yesterday, for instance, whilst heading home from school, he wished me a Happy Diwali. Not being au fait in regard to the Hindu festivals, I must admit that I hadn't realised the time had come around again.
Then this morning, a further surprise, this time The B showing me that he is starting to learn not just about different cultures, but also about languages.
It came at the school gates, as The G and I prepared to bid him farewell.
'Goodbye,' I said to him, just like always.
The B thought about this for a moment.
'Adios,' he replied.
I looked at him in bafflement.
'I'm speaking Spanish,' he explained, before disappearing into the classroom . . .