Often people ask what our number one selling product is. By far the BIGtrack takes first place. Mostly because it can be used by so many people with so many different abilities.
Young children from around 2 to 5 years old should all be using it because these kids haven't developed their fine motor control, which is what it takes to operate a standard mouse. Since the BIGtrack has such a large ball people of all ages with poor motor control can operate it. We even have users using it with their feet. We have a list of dealers at http://www.bigtracktrackball.com/. Or just call us if you have questions.