3 - 7 years. Spanning cultures and generations, Greg & Steve touch every aspect of the early childhood curriculum. With more than two million recordings sold to date, Greg & Steve hold the rank of the number-one children's music duo in the country. It's easy to see why their singable lyrics and catchy melodies are set to a contemporary beat. Parents and teachers alike find Greg & Steve's tunes a fun way to teach children basic concepts such as colors and numbers as well as friendship and cooperation. Available individually or in a set of four CDs (Volumes 1 through 4).