My parents have the basics of everything the girls need when we go there, so we don't usually need to pack much which is awesome. They have two booster seats, a pack n play, sippy/kids cups, toys and other kid odds and ends like meds, lotion etc. I bring diapers and wipes and leave a good handful there. When the kids were babies they had a high chair, bouncy seat, swing, jumperoo etc and in those early days that was super helpful.