When we were in the 2nd or 3rd grade, my friends and I would spend our
time writing down integers, one after another, starting from 1 and going into
the thousands. This task had no goal other than producing a really mammoth set
of sheets of numbers, higher and higher, to dizzying heights. What were we
thinking??!
I believe that I began to come to grips with the concept of infinity by this futile effort.