If schoolchildren led the way with crackers, could they also lead the way with a better approach to solid waste management? That is the thought behind ‘Trashonomics’, an easy-to-read and illustrated booklet that explains, through the device of a crow — a bird which wastes nothing — how children can reduce their waste footprint.   Conceived by Bengaluru-based Archana Prasad Kashyap and Claire Rao, the idea is to guide and prod children into adopting good practices as a way of life that will last into adulthood.