Sign up for the free Grand Illusions newsletter, at http://conta.cc/3dplns1
_______________________________________________________________________

Tim sends out well over 100 Christmas cards every year, and as well as choosing an unusual card, he also encloses all kinds of optical illusions and puzzles that he has come across during the year. Not surprisingly, he receives some very entertaining cards in return. And each year his favourite cards will be added to his amazing toy collection. But before he does that, he shares them here with you, on the Grand Illusions channel.

Tim's friend Mark Setteducati always creates unusual cards, and this year his card is based around a concept called the Magic Square. But this is no normal Magic Square!

Tim received about ten cards with a deer theme, and some of them - as he shows here - were quite unusual.

From the USA, a card that opens like a paper Christmas decoration to form... a 3D ice cream sundae!

A card with a pixelated design which is hard to see when it is close, but as it is viewed from a distance, the design becomes clearer.

A Reverse Perspective card from the artist Patrick Hughes.

A paper umbrella with a witty message added around the edge of the umbrella.

A card with a Christmas tree and a fairy, where you need to get them to align.

A hidden message in the next card. Is the UV torch that comes with the card some kind of a clue?

A Santa character on a bike, but with artwork built around fractals.

Finally a pop up card with an amazing sailing ship. As Tim says... 'wow'.