The optical illusions are those mind-bending games that play with shapes and images and point of view. There are kinds of ...

Can you spot the hidden number? This optical illusion features a grid of identical circles with 96 and 69, but one lone circle has the number 99. Optical illusions like this challenge your observation ...

The picture, made up of black and grey lines, makes it almost impossible to work out - and what's more humiliating, is that this optical illusion is designed for children by Optics4Kids.

Located at the top of the heavily (tourist) trafficked Royal Mile, Camera Obscura is filled with enough colorful puzzles, games and optical illusions to keep the kids (and adults) entertained for ...