If the public likes your product, your age will make no difference. I would suggest a line of hair bows for all occasions. You could start a fad and get rich overnight. Bows like:
"Birthday girl" printed on them.
Red White and Blue for the fourth of July.
Red and green holiday bows with berries.
"Favorite things" bows with little dogs, cats, horses, flowers etc.
The only limit is your imagination.