Dhaka, July 2 -- On a warm, dusty morning in the heart of Dhaka, the sound of crayons scratching paper fills a small classroom. A group of children sits at their desks, sketchbooks open, drawing something that most adults in the city barely speak about-public toilets.

Some children giggle at first, others fidget uncomfortably, unsure how to begin. But curiosity soon replaces hesitation. A little girl draws a toilet with a ramp for wheelchairs and flower pots outside. Another child adds a handwashing station with soap and a smiling cleaner. One boy draws a simple door with a lock, painted in bright colours, and a sign that reads: "Welcome."

These are more than just childlike doodles. They are pieces of a growing, citywide conversation-on...