Have you ever wondered what lies behind a waterfall? Lucy did. Join Lucy on her magical secret envelope journey into fairyland and discover how fairy laughter is made, who the mischief-makers are, where stardust comes from and other fairy secrets.Have you ever wondered what lies behind a waterfall? Lucy did. Join Lucy on her magical secret envelope journey into fairyland and discover how fairy laughter is made, who the mischief-makers are, where stardust comes from and other fairy secrets.