Attention They Need
Grannies are like kids, they are just as vulnerable as kids are and they need the same attention kids need. They need to feel that there are people who care about them and they need the feeling of being needed. This is the feeling they are in most cases deprived of. It is common for them to stay alone and it is common for them to feel like no one needs them
Take care about your grannies and they will care about you. They actually don't need those details about lives of other people and they don't need other strangers care about them all they need is to feel that they are of the same importance they were. They need to feel that there is some one who can't live without them and their help.
The only thing they really need is the attention of those people they love. The only thing they really need is the feeling of life is not over with the retiring age and the feeling that it is just a beginning of life full of pleasure and free of duties they never liked. They need the duties though they need the duties that make their live, but not the duties that make them tired.
Call them when you miss them, call them when you feel they miss you. Call them at least to ask about how they feel and at least to say that everything is okay with you. Call them and grant them with the attention they need. They really need it.