File this Under Empathy?

This may be stretching sustainability theme a bit far.  But had to post these pictures of second graders learning how parts of a suspension bridge feel.  Tension or Compression? Depends on whether you are a tower, buttress, anchorage or the load!

Thanks Steve for teaching us how to bridge  the gap between "teaching" and deep understanding.
Thanks Stefania and Polly for sending in the pictures.