city park with an educational corner where it is possible to try out how the water supply system works with the toilet flusher. tr

aids asphalt barometer children city connection construction consumption corner education educational expansion flusher flushing garden how illustrative know knowledge lawn machine metal meter park pipe pipeline plexiglas plumber plumbing portable possible preschool presentation pressure schematic school sewage stainless steel sunny supply system teacher teaching toilet transparent try tub turbine valve vessel water where white works yard