The TinyMouse is about half the size of a standard computer mouse and just right for smaller hands. Now with optical tracking, there is no more ball to to become dirty, lost or malfunctioning. The colored buttons help out folks who haven't quite mastered their lefts or their rights, making child's play out of pointing and clicking. The White mouse has a simple blue-click or yellow-click, while the Black mouse has red-click and blue-click. Folks will learn with greater comfort and control without becoming easily discouraged.