I was reading an article in the paper this morning. There are a few seniors' centres in the big city near me that have day care centres incorporated into the building. And they regularly have cross-over events with the seniors and the little ones, like a singsong or arts and crafts.
Apparently, it is very beneficial for both sides of the spectrum: the seniors get some much needed social interaction, which is very beneficial to their health, and the little ones get to spend time with an older generation that they may otherwise not be exposed to. They've been careful about hand sanitizer and trying to keep the spread of germs to a minimum and have had no major issues.
It just made me smile to see the pictures of these little ones dancing with the folks in the wheelchairs and doing other activities.