The chip, which requires no power, works like this: Up to four megabits of data are put into the chip by touching the dot with an encased coil about the width of a pencil eraser.

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Another neat feature that takes advantage of the newfound hovering capability is the ability to toggle between brush, pencil and eraser simply by holding the pen above the screen and clicking the button.

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If you have a pencil, you can probably exchange it for an eraser, or maybe a post-it-note or something, if you happen to be sitting at a table with some fourth-graders.

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Additionally, you can flip the pen over and use it as an eraser, the way you would with a number 2 pencil.

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