The mama roo 3 0 from 4moms has been designed to mimic the swaying and rocking movements of parents to sooth your little one more naturally the creators of the mama roo measured the movements of real parents as they comforted their babies using motion sensor technology and programmed the mama roo to recreate these movements allowing your little one to be comforted and soothed more realistically than other rockers that simply vibrate or rock on one axis the 3 0 also boasts even softer plush