This full-skirt dress with a sash is a firm favorite with little girls for a good reason. It can be as dressy or as casual as you wish. With mothers it is popular because it is not a big headache to make and can be adopted for all occasions. Made with silk or satin it is fit for a any celebration. Make it in floral print and your girl will look pretty all summer.
For added interest you can make the sash out of different fabric, coordinated colour or contrasting, let your creativity decide. Another variation is to make the top in totally different fabric, might be useful if you working with leftover fabric from previous projects.