Hannah Testa may just be 10 years old, but she tries to live by some grown-up philosophies. One of her favorites, she said, is to “be the change you want to see in the world,” and another is to “be a voice for the voiceless.” The Kelly Mill Elementary fifth-grader has been doing both in recent weeks as she organizes a fundraiser for Save the Horses, an equine rescue facility on the Forsyth-Cherokee county line.