Anyone with kids has likely seen the commercials for Magic Pens by Wham-O. The markers claim to change color and erase like magic, but do they work?

In this video, you will learn 3 crazy visual pen magic tricks. Learn how to make a coin vanish with a pen, how to produce multiple pens at your fingertips and how to make a pen recap itself. Each ...

A digital pen invented at Microsoft’s Beijing lab will allow people to switch effortlessly between electronic documents and paper.