How parents tackle bedtime around the world

It's a precious moment for families around the world when twilight falls, children yawn and bedtime routines engage.
Yet the places where children sleep, the time they lay down at night and even how they prepare for shut-eye vary across cultures.
Even differences in children's bedrooms around the world can be striking, as in Venice-based photographer James Mollison's photo series "Where Children Sleep," which has been adapted into a book.
Though it has been nearly seven years since th