Heartsong Communications publishes ASL guides to teach children to sing and sign for fun. MaxiAids selection of Heartsong Communications books includes Sing n Sign for Fun-Songbook with Gaia, Sing n Sign Holiday Time for VHS and Sing, Dance n Sign in softcover. These unique songbooks include teaching segments that encourage kids to learn to sing and sign upbeat songs along with Gaia and introduces signs for numbers and colors.