Great pic! You don't look old to be a great grandparent. I've just come home from England and seeing my grandparents which is kind of sad, my Nanna is in a nursing home and can eat and breathe and thats about it and my grandad is able to look after himself just, he's getting worse and worse and says and does some pretty strange things. Its sad.
Its great to see a grandparent who has 100% of their brain cells and is able to use computers very well too!