little dragon appears to be looking at you. But if you rotate the
base this way or that the dragon's head appears to turn the other
if you stand the dragon on a shelf and walk about, the dragon's
head follows you around the room. And yet it is simply a sheet of
paper, cut and folded in a certain way. How does it work?
When we see a solid object rotating, there are all sorts of clues
that tell us what is going on, which way it is rotating, etc. The
dragon gives us the wrong clues, because we mis-interpret what its
shape is. The nose of the dragon appears to be pointing out
towards the viewer, but in fact the dragon's head is concave. Have
a look at the dragon from the back...
see the strange way the dragon's head is folded? The dragon was
designed by Jerry Andrus, and he calls it 'Eye-Foolery'.
Download the Dragon itself
download the dragon
a PDF file. Right click to download the file. This is a
need the Adobe Acrobat reader on your computer. It can be
downloaded for free here.
you have printed the dragon out (a color printer is best since this is
a color image) then you can cut out the dragon, fold and stick it, and
you will be able to see this fantastic illusion yourself. When you
print the page out, you will see that the instructions for folding the
dragon are included. Please follow these instructions exactly.
Print out two copies so you can use one as instructions while you cut
up the other.