This game has 8 K-Drons you can fiddle with. Buy online at Firebox.

Fantastic range of quality jigsaw puzzles. From stunning new designs to traditional favourites. Ranging from the relaxing to the ultra challenging. Immediate delivery of every puzzle.

Huge range of promotional Puzzles. Free quotes.

The stress here is on relative novelty and interactivity, in combination with a scientific background. Regularly updated.

Many works of Akiyoshi Kitaoka. Designs around standard illusions crafted to maximise the illusory effect.

Over 50 optical illusions and ambiguous drawings.

Gallery of pictures that will trick your eyes.

Collection of illusions and images chosen for novelty and distinction from the usual set found in most collections.

Dozens of optical illusions to tease your brain.

A growing collection of optical illusions and eye tricks, including original illusion pictures and a collection of optical illusion desktop wallpaper.

A collection of about 20 illusions - all accompanied by Java applets. Interactively changeable attributes help investigate which ones are in fact responsible for tricking the brain.

Contains many optical illusions illustrating a wide range of visual anomalies and surprising optical effects. A free screensaver, posters, and educational explanations are also provided.

Offers a number of optical illusions for viewing, as well as explanations on how they work.

Optical illusions, 3D stereograms and anaglyphs, fractals and brain teasers

A selection of optical illusions including an optical illusion quiz.

A multimedia museum of optical and sensory illusions, with online demonstrations and explanations.

Focus on geometric optical illusions by Gianni A. Sarcone and Marie J. Waeber

Site contains a collection of optical illusions, online games, and other fun things.

Illusions by Brincat Norbert for viewing and downloading.

A collection of optical illusion images, 3D street art, and flash demonstrations.

Optical illusions, eye tricks, mind teasers and other puzzles.

Amazing Pictures and Effects

Comments on the terms 'Optical Illusion' and 'Visual Illusion'.

A collection of various forms of optical illusions with explanations, including illusions conveyed through fractals, architecture, art, advertising and real life encounters.

A selection of common images.

A large collection of optical illusions.

A collection of riddles and optical illusions of many different forms with thumbnail browsing.

Selection of optical illusions, hidden images, impossible objects and upside down images.

A selection of old, new and original optical illusions. Many pictures are enhanced via the use of 3D and animation.

Impossible figures, optical illusions, multimedia and 3D puzzles.