The Blues Clues KidzMouse has been designed just for kids and tested by kids between the ages of 2 to 10. Easy to use, small, and comfortable for little hands, it works the way a childs hand works. A squeeze rather than a tap enables the child to click. It works on a PC or the Mac with a USB or PS/2 with an Adapter (included). Patented for small hands. Works the way a childs hand works - a squeeze rather than a tap. Easy to use, small, and comfortable for little hands.