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eureka!!!
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optical illusion

From the same authors of the article
Sarcone and Waeber
Curiopticals
Curiopticals, ISBN 1847322298
What are you looking at?
What are you looking at, ISBN 1847321836
Eyetricks
Eyetricks, ISBN 1844427773
Make your own 3D illusions
Make your own 3D illusions, ISBN 1844426327
Big Book of Optical Illusions
Big Book of Optical Illusions, ISBN 0764135201
New Optical Illusions
New Optical Illusions, ISBN 1844423271
Fantastic Optical Illusions
Fantastic Optical Illusions, ISBN 184442295X
Dazzling Optical Illusions
Puzzillusions, ISBN 1844420647
MateMagica book
MateMagica, ISBN 8889197560
Almanach book
L'Almanach du mathématicien en herbe, ISBN 2844690254

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Send an original puzzle eCard to your friends!

 
Envoie une e-carte à tes amisSpedisci una cartolina ai tuoi amici
 
"I can't understand why you don't get any mail from me. Perhaps it's because I haven't been writing..."
Groucho Marx

HOW TO SEND A PUZZLE CARD
Sending an eCard is easy, just follow the instructions at each step along the way. We also want to let you know that the cards are stored in a non-indexed directory so only you and the recipient will know how to find the card. This directory is also pretty secure from spammers, so send your card knowing you will not end up on any junk list.

After you have completed the card, you will be shown a preview. If you do not like your card, you may edit it and then send it, or just cancel the request. The recipient will receive e-mail advising where to find the card.


STEP 1: PICK A PICTURE & A SMALL ICON
Please select a picture and a small icon from the list below using the little Radio Button selector. You may only pick one picture per card. If you want to see a full size image of a picture, just click on it (then, to return your card-creation page, press your browser's Back button).

upstairs
Upstairs
Paradoxical ladder and stairs
impossible safe Virtual Bank
Unsafe safe!
square puzzle
Puzzle 1
Square compositions
pseudo spirals Psyrals
Perfects concentric circles?
krank calculator
Puzzle 2
Crank calculator
bird puzzle 3-piece puzzle
Make 1 more bird appear!
4d puzzle
Puzzle 3
Diagonal d of an hypercube
faces Ms Hyde & Ms Jekyll
Double faced
match puzzle
Puzzle 4
Move 4 match sticks...
restaurant illusion Restaurant illusion
After-lunch...
topological puzzle
Puzzle 5
Connect 5 points
moon Acid Moon
The moon isn't always a honey
maze
Puzzle 6
Path puzzle
twisted Illusion 2
Straight?
floating squares
Illusion 1
Floating cross
impossible figures Illusion 3
Impossible figures
what is cooperation Cooperation
Tell me what is...
network image Network
Phantom spots
oddities Optical oddities
Find 4 errors...
special shelf Illusion 4
Perplexing shelf
alien vision Alien vision
Seeing double?
bilateral pool Bilateral Pool
Reversible image
Season greeting cards
alien vision Xmas lights
Color motion
bilateral pool Xmas balls
Color expansion

Small icons
Add a small icon to your greetings message

no icons

monkeys bulldog
mad scientist pussy cat

STEP 2: FILL IN THE BOXES OF YOUR E-CARD
In the boxes below, enter your message and both your's and the recipient's name and e-mail addresses. Please, verify the accuracy of your e-mail address. Only e-cards with valid e-mail addresses will be processed.

Card Title
  Your Message
Greetings (love, best wishes, ciao bella...)

Select your text font + your text and background colors
Text font
Text color
Background

stamp

 

From (Your Name)
Your E-Mail Address
To (Friend's Name)
Friend's E-Mail
 
 
       

STEP 3: PROCEED TO PREVIEW OR START OVER
You are now ready to preview your card! To do so, just click on the Preview button below. If you want to clear the form and start all over, select Start-over. Your card will not be sent until you press the Send-card button on the preview screen.

 

To prevent abuse, IP addresses are also recorded, but are not made publicly available. Abusers IP addresses are being saved and in some cases being used to ban abusers from our site.

 

 

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