ÿþ<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <head> <META NAME="DESCRIPTION" CONTENT="A practical optical illusion for children and adults. Print and count out the image of the dragon. Stick it it together and prepare to be amazed as the dragon appear to move its head. 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However, if you look at it with just one eye, you should be able to see it as though it were convex (ie coming towards you). For some people this may take some time, but it is worth persevering. (If you are stuggling to see it, try not to look at the dragon with both eyes before you look at it with one eye. Put the dragon at eye level and stand about 4 foot away.) </p> <p>Once you manage to see the image in this way, start moving your head so that you are looking at the dragon from a different angle. It should now appear as though the dragon's head is moving, following you as you move! </p> <p>Click on the thumbnail images below to see how the dragon should appear from different angles.</p> <p>This illusion is reproduced with permission from www.thinkfun.com. </p> <table style="margin-top: 70px" align="center" border="0" width="300"> <tr> <td> <iframe name="image" src="dt.htm" width="90" height="400" frameborder="0" scrolling="no"></iframe> </td> <td align="center" valign="middle"> <iframe name="big" src="d.htm" width="350" height="400" frameborder="0" scrolling="no"></iframe> </td> <td> <iframe name="image" src="dt2.htm" width="90" height="400" frameborder="0" scrolling="no"></iframe> </td> </tr> </table> <div style="margin-top: 1em; margin-left: 280px"> <script type="text/javascript" src="http://s7.addthis.com/js/250/addthis_widget.js#username=onecentrob"></script> <div class="addthis_toolbox addthis_default_style"> <a href="http://addthis.com/bookmark.php?v=250" class="addthis_button_compact">Share</a> <span class="addthis_separator"> </span> <a class="addthis_button_facebook"></a> <a class="addthis_button_twitter"></a> <a class="addthis_button_googlebuzz"></a> <a class="addthis_button_email"></a> <span class="addthis_separator"> </span> <a class="addthis_button_facebook_like"></a></div> </div> <div class="center" style="margin-top: 5em"> <div> <a href="http://www.curiouser.co.uk/index.htm"> HOME </a> I <a href="http://www.curiouser.co.uk/puzzles"> PUZZLES </a> I <a href="http://www.curiouser.co.uk/paradoxes"> PARADOXES </a> I <a href="http://www.curiouser.co.uk/illusions"> ILLUSIONS </a> I <a href="http://www.curiouser.co.uk/poems"> POEMS </a> I <a href="http://www.curiouser.co.uk/quotations"> QUOTATIONS </a> I <a href="http://www.curiouser.co.uk/games"> GAMES </a> I <a href="http://www.curiouser.co.uk/facts"> FACTS </a> </div> <div style="margin-bottom:3em; margin-top: 1em; font-size: 70%"> <A href="http://www.curiouser.co.uk/stranger">STRANGER </a> I <A href="http://www.curiouser.co.uk/donate">CONTRIBUTE </a> I <A href="http://www.curiouser.co.uk/contact">CONTACT </a> I <A href="http://www.curiouser.co.uk/runciblespoonsociety">JOIN THE SOCIETY </a> I <A href="http://www.curiouser.co.uk/books">BOOKS </a> I <A href="http://www.curiouser.co.uk/links">LINKS </a> I <A href="http://www.curiouser.co.uk/privacy/privacy.htm">PRIVACY STATEMENT </a> I <A href="http://www.curiouser.co.uk/sitemap.htm">SITE MAP </a> I <A href="http://www.curiouser.co.uk/google.htm">SEARCH </a> </div> <div class="bottom_ads"> <script type="text/javascript"><!-- google_ad_client = "pub-2185628889904477"; /* 728x90, created 10/11/10 */ google_ad_slot = "6906520196"; google_ad_width = 728; google_ad_height = 90; //--> </script> <script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script> </div> <p style="margin-top:3em"> &copy; 2000 <a href="http://www.curiouser.co.uk">curiouser.co.uk </a>All rights reserved. </p> </div> </div> </div> </body>