First of all, a very happy birthday to your grandmother. I am very happy that you celebrated her birthday, and that you yourself prepared a cake for her at home. You have made all these arrangements for her happiness. These are the kinds of joys that keep our elders very attached to us. They are happy with them in their old age. We should keep giving them such gifts and small joys so that they can spend their last moments in peace and enjoyment. You have made your family very happy with this small effort.