Place a camera on a long arm mount at one end of a rolling lecture table and the meter stick reference at the other end of that table.  Use the brick wall as a background.  Notice how the background moves as you rotate the camera on the long arm while looking at the meter stick. 

Place the monkey between the patterned wall with the black string reference and the observer.  Have the observer block one eye and note the reference point and then block the other eye and notice that the reference point changes in relation to the monkey.

Another way to do this is to move the monkey across the distant background.  Observers sitting in different places in the lecture room will have different views.