
Here is a list: Add special buttons, a colorful waistband or insert, fun ruffles, a scarf attached in an interesting way, an applique, a fancy pocket, ribbon, a jewelry item that can be taken off prior to washing the dress, a headband to match part of the dress, sew a little purse with the same fabric, tassels, charms sewn on an applique, rhinestones attached in a secure way, fabric paint added to the design of the fabric, the name of the wearer - either embroidered or painted, matching dresses for mom and daughter.
Have some more ideas? Send in your comments.