The following categories can be considered as birthday gifts for dad:
Health care: Dad's health is the most important thing when he is old. You can choose some health care gifts, such as massager, sphygmomanometer, health care products and so on. Help dad stay healthy.
Hobbies: Get to know dad's hobbies and give him a special gift. For example, if he likes music, you can give him a concert ticket. He likes reading, so he can get a good book.
Practical life: Dad needs some practical items in his life, such as briefcase, watch, razor and so on. These gifts can make him more convenient and comfortable in life.
Commemorative collection: Give some commemorative or collectible gifts, such as photos of dad when he was young, souvenirs of favorite stars, etc. These gifts can make dad feel more profound and cherish when he recalls the past.
Family experience: Giving some experience gifts, such as family trips and parent-child activities, can make dad feel the warmth and happiness of the family.