My wife's sister's grandchildren are coming to spend time with us during their Christmas vacation from school. Since my wife stays pretty busy with her volunteer and community work during this time of the year, I will be the primary babysitter for most of their time with us. My wife told me to look up ways to keep the children entertained, so they don't get totally bored and never want to come back to see us.
I don't want to sound like an old stuffed shirt, but when did kids get to the point that they need to be entertained during vacation time? When I was a kid, being out of school for a couple of weeks was entertainment in itself. And I didn't need any help finding anything to do with the time.
Even when my daughters were living at home and on a break from school, we never had any need to provide them with entertainment. Shouldn't they be able to entertain themselves?