I actually did this a couple of years ago when I hosted a holiday party for my “over age 60” neighbors. I called it the “kids party” and scheduled it one week before the “adult” open house that served wine and eggnog.
There was a sign at the door telling people to leave their worries outside and put on reindeer antlers (provided) before coming in. We sang Christmas carols, made easy holiday crafts and ate finger foods, including strawberry Santa hats and drank flavored bottled water. And as they used to say “a good time was had by all.” If I do it again I might serve hot cocoa with marshmallows and/or candy canes.
Most adults would really like to be able to act like kids once in awhile, they just need the opportunity and a little encouragement. So next time it’s your turn to entertain think about having a kids party for grownups.