congratulations gift

My sister gave birth her second baby last month and until now I have not sent her a gift. I wanted to congratulate her for having a new addition to her family. I wanted to send her a congratulations gift for her because I knew how happy she is finally giving birth to her little boy. She named her son after our father and the name of her father in law and I am very happy about it. I can not make up my mind what kind of gift I might send to her chocolate cake or flowers. She likes chocolate cake so maybe I will send her the cake. I am sure she would like it.