There's something pretty special about rereading your favorite kids' books when you're older. You see the characters, the messages, and the life lessons in a whole new way. That's why we love the idea of children's book-inspired iPhone cases for grown-ups. Ahead, we have 12 picks that are sure to induce some literary nostalgia in the best way possible. Warning: it will be hard to pick a favorite, so don't be surprised when you want them all.