Like most parents of young children, I come to each stage of childhood like a slack-jawed yokel, not knowing the first thing of what to expect.
I have been blown away to recently discover that spinning tops have made a huge resurgence in the four- to 8-year-old male set.
Only nowadays they're not known as spinning tops any more, they're known as "Beyblades" and come accompanied by a typically incomprehensible Japanese anime series and cool merchandising names like Flame Saggitario and Storm Pegasus.
That's perhaps why, in the weekend at a "Beyblade birthday party", a 70-something-year-old grandparent mentioned to me that she had no idea what game the boys were playing - even though the principle of the game probably hasn't changed since the infant Jesus was spinning his wooden top on the streets of Nazareth.
Even my son, who was once presented with an actual old-fashioned spinning top, showed scant interest in the real thing, while we've practically had to pry his Beyblade off him with a crowbar as he's slept or bathed.