Three-year-olds are a lot of fun. It is around this age that children begin to understand what their birthday means, so be sure to attend your special three year old’s party armed with happy 3rd birthday wishes that match their excitement! Happy 3rd Birthday Wishes Happy birthday, to my favorite 3-year-old. Nothing makes me happier than celebrating this milestone, and looking forward to the rest! We could hardly wait until we had a child of our own, and here you are, already three! Happy birthda