(J3 Music Studios). Climb the mountains of Peru and enter Siku's world, a place where melodies drift through the hills and valleys. Sing along with Siku, a young alpaca who breaks the rules in order to express herself by singing and humming the songs in her heart. This storybook helps children explore the musical element of melody. Siku's song is like the pan flute's voice, clear and strong. A companion CD includes a pan flute party jam track, an audiobook of the story, and easy-to-sing "In My Heart (There Is a Song)," written and performed by Julia Jordan Kamanda and her students.