Pompoms are the activity of the week in the Zentil house. After a certain two year old undid an entire roll of wrapping paper for me, we were left with the cardboard tube. He played with it as a bat/ sword/ weapon for a while until I had enough of being pummeled and I took some scissors to it to make it into an angled pipe.
I taped it to the window and gave him pompoms to stuff down the pipeline. It's a great indoor activity and fairly mess free !