The 'sing to the stars children's story' might revolve around a theme of imagination. Children often have vivid imaginations, and singing to the stars could be a way to explore the unknown and the magical. It could be set in a fantastical world where the stars have their own personalities and the act of singing is a way to interact with them. The story might also teach children about the beauty of the night sky and the importance of expressing oneself through music.
I'm not sure specifically as I haven't read it directly. But it might be about a child who has a special connection with the stars and sings to them, perhaps as a form of communication or expressing wonder.