Caber or Flute?

This morning BabyCyclops was just hanging out (on his octopus play may, in his grobag) in the kitchen while I did some tidying up. He seemed fascinated by this cardboard tube, so I let him play with it.

In just a few minutes he experimented with using it as a caber, flute, weapon, trip hazard (for me), rolly thing and chew.

By this time it was too soggy for further experimentation.