This concept, thought up by a group of students at the Worcester Polytechnic Institute in the United States, would allow you to control your computer’s cursor with a ring worn on your hand! Although it might not be a suitable replacement for the regular mouse altogether, it is definitely a cool idea and one that could have some very useful benefits.
The mouse was described by the students as a "3-D computer mouse designed to permit a computer user to control and manipulate items on a computer screen just by pointing at the monitor.”
Some uses for the MagicMouse that a regular mouse falls short of: teaching users to conduct an orchestra or make music with simple hand movements and fast, efficient photo editing.
The MagicMouse cost only $155 to design and the students intend on continuing work, developing its functions further before releasing it into the wild.