Little Johnny has been bringing his drawings home from kindergarten
everyday since he started a month ago.  Each day his mother admires the
pictures and hangs them on the refrigerator.  One thing starts
bothering her though.  Little johnny only uses black and browns for his
drawings.  Fearing a problem with her young son and not wanting to make
it worse, she decides to take him to a child psychologist.

The psychologist delicately goes to work.  He gives Johnny a battery of
psychological tests.  He chats with Johnny.  Everything seems perfectly
normal.  Everyday for two weeks, the tests continue.  Yet everyday,
little Johnny continues to bring home drawings in only black and
brown. Frustrated at not being able to get to the root of the problem
and fearful that something is terrible wrong, the child psychologist
decides to give little Johnny some paper and a box of crayons and
observe what happens.

Little Johnny opens the box of crayons and says "oh boy!  A new box of
crayons!  At school we only have old boxes.  The only ones left in mine
are black and brown!"