Is this normal

Today was spring cleaning day, yes I am crazy, I try and do it 2 times a year at least. I do not know if it is normal but let me pass this by you. My grand kids have their own play room, their own bedroom and a dresser full of clothes. See, my daughter only has to bring the kids everything else is here, she doesn't even have to bring the formula for the baby. Is this normal, or am I crazy. Everyone I know thinks it is crazy that I have so much of my home devoted to my grand kids, so I begin thinking I have lost it, them I think these are my grand kids and I will do what I want to do. What do you think, should grandparents have such devotion to the grand kids?