Go there early in the morning to help her do some housework, tidy up the house, find a decent hotel to order a birthday meal at night, and then remember to order a cake and sing her a birthday song. Call your mother more often, the kind that breaks your heart will make her feel comfortable.
Anyway, old people generally show off and hope their children will be filial. You'd better make it bigger so that all her friends and neighbors can see it. She must feel that there is light on her face and she will be happy naturally.
That's basically all. The old man will be very happy if he is sent away like this. If she has any other special hobbies, she will do what she likes.