One of my fondest childhood memories is of clambering over rocks along the undercliff with my grandfather one gloriously sunny day during school holidays. My family emigrated when I was still a child, so I spent too little time with him and did not know him well. He had passed away by the time I returned to the UK as a young man.
Firstly, don't do it. Leave the baby with grandparents, a childminder, your neighbour, the local shopkeeper; anyone who's free. But if none of these options are a goer - if, for instance, your sister is getting married and has vaguely assigned the role of flower girl to your not-quite-walking daughter - you'll have to bring them with you.
The legal right to have contact with grandchildren bypasses the hard work needed to fix relationships in family breakdown. It is a cheap way to avoid facing the idea that the grandparent might have had a part to play in the breakdown of the situation, and could be partly responsible for amicable contact becoming withheld in the first place.
I notice a difference in him immediately. His blue eyes are less focused, and he looks confused when he first sees me. As if he's thinking "I know that girl, but I just can't place her". His soft, wrinkled hands are shaky when he grasps mine in his, as I help him up from his chair. His smile is wide, but uncertain.