Amy Chercass Sacks is striking out on her own. The veteran children’s designer, who has created product for such brands as Stuart Weitzman, Kors Michael Kors, Mia, Esprit and Stride Rite, is launching Lucky Sole for spring ’13. The collection, targeted to tween girls, features a colorful assortment of sophisticated sandals and ballet flats, embellished with ruffles, rhinestones, sequins, oversized rosettes and other feminine details. The ballet flats also have a short poem inscribed on their soles. Priced from $69 to $94, Lucky Sole will be sold by higher-end department stores, e-tailers and independents including Lester’s in New York, with the first delivery slated for January.