Winnie's celebrates her unique style through her first year with a double-digit age as she has many new experiences, from the high of spending time in New York City with her aunt and big sister, to the low of her two best friends suddenly becoming interested in boys.
Eleven was big. Winnie got a new best friend, and a new worst friend. But twelve is going to be huge. Last year everyone else changed, but now it’s Winnie’s turn to “develop.” Ack! Twelve is going to be a big year for Winnie, she just knows it. After all, she’s one step closer to being a teenager, but there’s just so much to deal with: pierced ears, sleepaway camp, junior high. . . .Can Winnie handle the pressure? And most important, can she handle bra shopping with Mom—in public?
Winnie's thirteenth year brings many joys and challenges as she negotiates her relationship with her first boyfriend and realizes that change is inevitable in her friends, family, and even herself.
As Winnie and her friends count the days until the beginning of high school, they attend a summer camp where they learn about sea turtles--as well as human relationships.