This educational product helps kids master math skills required by the end of 2nd grade. Listen In Addition is a music CD featuring the addition facts for zero to 10, adding doubles, and counting to 100. The companion book is a sturdy board book with a slot in the back cover for the CD. The original music and companion book help math stick for kids who benefit from a combination of audio and visual elements. By focusing on original, catchy music, it answers a growing demand for an educational CD that all ages can enjoy. This is a fun product that combines original music, whimsical artwork, and educational content.