I did my bit to mark May Day today.
This morning, there were three large palattes of bricks sitting on the road outside my house, and they needed to be moved into the yard.
So, I started off by explaining child labour to my kids (seven year-old twins). The long exhausting days. The tiny wage-packets. The heavy lifting. The back-breaking loads. The way that - if something isn't done properly - that you don't get paid for it.
By nightfall, the bricks were neatly piled in my yard, the kids had a real sense of solidarity with their brothers and sisters in China.
And I was 40p poorer.