Slumber Bears, invented by a doctor,arestill the only product of theirkind to contain a recording of actual intra uterine sounds which really helps to lull your Baby to sleep in minutes.The Slumber Bear Plus contains asound boxwith the intra uterine recording as well asa lullaby feature, nature sounds featuring ocean waves, rain and whale noises, white noise and a recording featurethat allows youto record yourbaby's favourite sounds, for exampleyour voice or afavourite lullaby, tune or book.