Talking to parents on the phone often, being in a good mood is a positive sign of health.
I often send my parents some fresh seasonal fruits by mail, otherwise they won't be willing to eat them themselves.
Frequent communication with brothers and sisters and asking them to call their parents will increase family ties.
Encourage parents to take part in activities and take a walk in the morning and evening.
In short, it is to make parents happy and eat well, which is better than anything else.