The Wilson Blush 21 is an excellent option for the 4-6 year old girl looking to learn how to play tennis. It features a very lightweight frame that makes it easy to swing coupled with an 95 square inch headsize that provides plenty of sweetspot. The frame is made of titanium, making it strong and useable even when the junior is rough or dropping it over and over. The small grip makes it easy to maneuver and help protect the wrists and elbows of a young player. Ideally suited for junior players between the ages of 4-6 years old.