In that post I enumerated all the different physical levels on which the children could and did operate; I counted seven. Those levels created many more spaces which I did not enumerate. Now when you have intriguing and complex spaces for children to explore, they will formulate their own play that is both unique and varied.
The simple act of transferring corn from one level to another level takes on a whole new dimension. Watch as the child in the video below spoons the corn from the bottom of the tub to a shoulder-level tray.
To get the corn on in his spoon, the child had to reach deep into the tub and scoop horizontally with the spoon. He then had to move his spoon through vertical space all the while keeping the head of the spoon flat and steady so he would not loose any of the corn. When he reaches the right height, he then has to move his arm laterally to get the spoon over the target tray. Finally, over the target, he twists his wrists to drop the corn in the tray. Simple motor play? Hardly.
That whole process is that much more intricate and complicated when the children are working on and between multiple levels and spaces.