Which vaporizer works the best for a young child?

Either: All vaporizers put moisture into the air and that can be comforting when the air is dry. Air can be naturally dry due to the climate or weather or dried by indoor heat or air conditioning. Pediatricians generally prefer cool mist humidifiers for safety reasons-- children can get burned on steam vaporizers. Also additives for steam vaporizers have never been tested for safety or effectiveness.