Optical illusions are fun ways of tricking the brain. Some of them cause us to perceive movement when their is none, others cause us to see something as being far larger or smaller than it really is, ...

Try making a 3-D hand drawing. It’s easier than you think and requires no special artistic skills.

Gimp, or GNU Image Manipulation Program, is a free graphics application that you can use to create and edit images and photos. You can also use Gimp to draw your own pictures by using the Paintbrush ...