DESC: Prince Lionheart The Slumber Bear by Prince Lionheart was invented by a doctor and is effectively used in hospital nurseries for over 25 years. The Original Slumber Bear contains the ONLY actual intra-uterine, recorded womb sound to help lull your Baby to sleep. Sound and motion sensors re-activate recording when Baby cries or jostles bear. Additional hook and loop straps allow you to secure the removable audio box to crib rails and strollers.