Children (2) Cities and towns (2) École (2) Villes (2) Enfants (2) école (2) Marseille (1) Hong Kong (1) Development (1) Adjective (1) Photographs (1) Environmentalism (1) Urban geography (1) Green movement (1) Walking (1) Time (1) Schools (1) School children (1) School recess breaks (1) Playgrounds (1) Plants (1) Numerals (1) Learning (1) Goal (Psychology) (1) Gait in humans (1) French (1) Fences (1) Face (1) Example (1) Transfer (1)