The optical Tiny Mouse™ 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 malfunction. The colored dots on the buttons help out children who haven’t quite mastered their lefts or their rights, making child’s play out of pointing and clicking. With a simple blue-click or red-click, children will learn with greater comfort and control without becoming easily discouraged.