I’ve seen boys like to do it too, although they go for different ages and for different lenghts of time. For example, a couple of 10 year old girls will happily watch under 18 month olds for a half hour or more, when a couple of 10 year old boys will opt to take a group of 2’s and over to play ball in the yard for about a half hour. Obviously, those are basic generalizations. Work with what you’ve got in your guest array. But the kids young and old like it.