Canada is going grey. For the first time ever there are more seniors than kids, and the median age across the country is 40.5 – up from 31 in 1985. Among other things it will mean slower growth in the workforce as baby boomers start to retire, which will affect the economy. There will also be more demand for social support. Still, Canada is the second youngest of the G7 nations and can learn from the successes and failures of countries like Japan where more than a quarter of the population is at least 65 – and there’s bigger demand for adult diapers than children’s diapers.