Archive: The Vicks Sweet Dreams Cool Mist Humidifier creates cool, visible mist to help temporarily relieve your child's cough and congestion symptoms for better breathing and more comfortable sleep. The ultrasonic Vicks Cool Mist Humidifier has a built-in projector that transforms your child's bedroom with nine dream-inspired images in three themes: sea, safari, and starry night. Designed for small to medium rooms, this sleep humidifier has adjustable mist control and ultra-quiet operation that helps your child rest soundly. The 1-gallon tank allows up to 24 hours of operation, and the air humidifier shuts off automatically when the tank is empty. A large tank opening makes the humidifier easy to fill and clean. The Vicks Sweet Dreams Humidifier doesn't require any filters, and it accepts up to two Vicks VapoPads to provide soothing menthol vapors. A sample Vicks VapoPad is included.