Children with severe physical disabilities or profound and multiple learning difficulties can find it very difficult to control their environment. They are denied many of the early learning and interactive experiences other children have. In order to provide activities that they can control, it has become common to use simple, battery operated toys and other devices which can be adapted for switch use. Jelly Bean switch is the most commonly used switch but Foot Switch, Mini Click, On/Off, and Koosh switch are equally popular for environmental control.