OK, I know all the stuff about needing to be hydrated at all times. I do suspect that a lot of it is the result of cunning marketing by the bottled water industry, but that's another story.
What I am puzzled by is that I don't think anyone could say that children's attention spans have improved over the last few years. In fact, rather the opposite. So what's going on here? Are their brains possibly becoming waterlogged?