This boy has inserted a small piece of stiff pvc pipe into the large flexible tube. He has laid the tube on the table and begins to experiment with his little apparatus. He lifts up one end of the tube and then goes to the other end and pushes the pvc pipe back into the tube. He then lifts up the end that has the pvc pipe and see that the the pipe moves slightly down the tube. He then seems to do some straightening of the tube before lifting up the end opposite the pipe. He then lifts the whole tube off the table from the end that has the pvc pipe. At this point, his actions seem to be very intentional. He now seems to be ready to have the pvc pipe slide down the length of the tube and out onto the floor.