The sweetest people are those who are nothing but kind to you. And your sister has always been kind. Whether it's pretending to enjoy your burnt cookies or checking-in after a rough day, your sister has your back. On her birthday, let your sister know how much she means to you. Wish her cake and candles, a birthday full of sweet treats. Let her know that you could not have asked for a better sister or a better friend. Tell her you care with this birthday card.