Abstract: A device for blowing small volumes of air across a mattress in a crib to prevent the accumulation of undesirable gases includes a pump, blower or fan, an elongated conduit connected to the pump, blower or fan and positioned adjacent the top surface of the mattress. The conduit has a plurality of longitudinally spaced perforations therein so as to provide a plurality of directed air flows across the top surface of the mattress. The conduit can be rested on the top surface of the mattress, but can also be hung from a vertically adjustable side rail by a vertically extensible telescoping mounting bracket. Dual conduits can be connected to the pump, blower or fan in parallel and positioned at either side of the crib.