When you look at this design, ghostly black dots appear in some of the intersections. They are not random, but always appear where you are not looking. They ...

Welcome to the Exciting World of Optical Illusions   A massive collection featuring interactive live optical illusions, exhibits, artwork, games, puzzles! ...

Sending an card is easy. Just follow the instructions at each step along the way. Only you and the recipient will know how to find the card. This ...

Here is a list of all the pages at SandlotScience. You can also browse the site by doing a search (above), or using the expanding menu tree (left). ...

Impossible Objects Impossible objects are reasonable parts put together in un-reasonable ways. They may look okay at first, but taken as a whole they fail the ...

or... Cognitive Psychology can be fun! Experience the Stroop! Take these three easy-to-do tests. They're fun and only take a few minutes. The results will ...

Here are several project plans, and information sheets in PDF format (8.5 x 11).       Plans for a 3-dimensional, ...

Playing Cards Y&B127 Optical Illusions & Visual Oddities Double Deck $15.00 Optical Illusions & Visual Oddities. Two new ...

The term ambigram coined by Omni magazine, refers to certain words and designs that read the same upside down. Don't confuse them with Palindromes, which are ...

Moiré (more-ray) patterns happen when you move transparent patterns over one another. The top pattern in this example is transparent and moves in a steady ...

Where is the Island? In autumn, cold air descends on warm water to create an inferior mirage. Lower parts of this island disappear while higher parts have a ...