3 of my grands spent a lot of time with me... The older two are twins and they were a handfull for DD after they started walking LOL I loved having them come up to stay for 4 or 5 days at a time. Sometimes twice a month, sometimes longer when my DD had to go to work. Daycare is so expensive... I would also go to her house and watch them there at times. I also get them when they are sick, they can't go to daycare and I usually don't catch virus's.
To me it is not a problem, I love having them around!!!