She couldn't read or write, but she outwitted bounty hunters and sheriffs and led her family, relatives and others to their freedom. Keep this pocket sized Harriet Tubman keychain by your side to guide you through your day. Each String Doll has her own special power that is always positive and helpful. Every doll is handmade from one piece of string with added accessories. Durable enough to be used as a key chain, or bag charm.