I did not have tiny marshmallows so cut up some big ones. The next morning I asked them to decorate my tree. It was kind of a surprise when I remembered that hubby and I had donated our full-size artificial tree to the thrift shop last year and only had the small artificial tree to decorate. But it also meant that they were the age where all I had to do was select the boxes of ornaments with the right colors and tell them to put on the decorations. It was fun seeing them discover new (to them) decorations and put stuff on the tree.
There was no argument or shoving or anything. They worked exactly as if they were Santa's elves! They alone brought the season of joy into my heart.
(I elevate it on a small wooden box that normally holds other things in the basement.) I put the cover around the base and then I get a really lovely Christmas tree with an aura of specialness this year. Scrooge has retreated.