Maybe <i>A FORTRAN Coloring Book</i> <a href="http://www.seas.gwu.edu/~kaufman1/FortranColoringBook/ColoringBkCover.html" rel="nofollow">http://www.seas.gwu.edu/~kaufman1/FortranColoringBook/Colori...</a> (I can't be sure since I got my copy long after I'd learned FORTRAN and wasn't using it anymore, but it looked OK or better).