Mary Allyson WingstonIn Roll Over, Roll Over, Allyson shares the song that she would sing to her sons Keenan and AJ before their bedtime each night when they were young. As they grew older, Keenan and AJ would participate by holding up the number of corresponding fingersfrom ten to one and roll their fists while singing Roll Over, Roll Over. The song helped them to understand the law of subtraction. Read More Read Less