Do try and talk about practical issues before you start looking after your grandchild. Having this discussion will be a good way to establish ground rules, as many parents and grandparents worry whose rules should apply when the grandparents are looking after the grandchild.  Remember that children need consistency – though they can accept, for example, that in grandma’s house they take their shoes off and put their own toys away even if this isn’t expected at home.  It's also a good idea to discuss who will pay for what, where you'll look after the children (at your home or theirs, for example), and how long you might be doing it for.