You can send him a middle-aged and elderly household moxibustion instrument. Health is very good. Old people generally hope to be healthy, and good health is also the blessing of their families.
Sending him a ceramic green glaze health care cup may also pay great attention to health care. You can give him a living porcelain health cup to make your life healthier.
If you are tired at ordinary times, your body will be very tired. You can soak his feet. Let him soak his feet well when he gets home, which will make him more relaxed.
Of course, it is the best gift for him to have time to see the old man more, care about his physical condition and chat with him more. I hope I can give you some inspiration.