That led to a more articulated joint endeavor: filling the tube with sand through their modified path.
My thinking begins with an idea of something I would like to build. Once the apparatus is built, I turn it over to the children for their thinking. Their thinking is doing; it is playing with ideas that surface in their actions. Once I observe how the children think in this space, then I come up with new ideas that I try to realize. Then it is the children's turn again, and so the thinking continues. There is not script. Ideas bounce around that emerge from our actions with others and with the materials and the setup. In other words, this is a rich space for thinking for me and the children.