A mouse - so small that it'll work while it is tied to your finger.
With the movement of just your fingers, you can easily control the cursor. The 800 DPI Optical finger mouse from Logisys virtually works on any surface (say good bye to mouse pad) except the reflective glass surface - common with any optical mouse.
Point the cursor with your index finger while your thumb to control the left button ( lower button), right button ( upper button) and scroll wheel.
Strap it on your finger and start using it.
BUT, it is still available in corded model ( USB Mouse) , hope we could see it in a bluetooth model soon !