294601 Character Face Design

I have some existing Illustrator files of some hip hop characters that I need to change the facial features into child/younger faces. Basically, the faces of the characters are too "old' and "angry". I need the faces of the characters (one male and one female) to be younger (6-11 years old) and more friendly ie smiles etc I need you to develop a male and female 'face' to replace the ones in the existing Illustrator files. I expect that you will need to just create the initial male and female face and then adapt it as needed to each of the existing characters