The purpose of this study was to compare the performance of four power wheelchairs when used by children to perform a variety of indoor activities. Eight boys and eight girls performed a series of 11 functional tasks when positioned in each of four different power wheelchairs reflecting different design classes. There were no significant differences for many of the dependent variables. However, the Everaid Turbo was significantly better for functional positioning at a standard kitchen table and at school desks and for accessing objects at different heights. By contrast the Invacare Jaguar was better for straight-line driving speed. Other findings include children's subjective impressions of the four power wheelchairs.