The most innovative feature of PGK educational tools, books, activewear and other products is that whether they're bundled or individual items they're all enhanced by the inclusion of songs from PGK Music Box. These songs, sung by beloved PGK characters, entertain and teach children life lessons in the areas of basic academic skills, character development, personal care, and care for our environment. PGK Audio also include PGK Action Adventures from PGK Books or PGK Activewear.