Not a must have! -must have is a maketing ploy.
I got his lamb and found out it's just another baby thing that will be seldom used. Babies don't really care about the ocean, whale or the rain sounds, they don't know what those sounds are! This lamb with sounds are more geared for adults who find them relaxing. It's a cuddly stuff toy, minus the velcro at the back. Good marketing though by making it sound like it's something every parents must have. I say not!