A toy gun includes a body, a pinion located in the body and a turning member mounted to rotate about the pinion. A number of barrels each rotate upon the turning member at radial positions. Each barrel has a gear meshing with the pinion. Each barrel has a circular array of projectile-receiving tubes. An indexing mechanism causes the turning member to rotate about the axis whereupon the meshing interaction of the gears with the pinion causes orbital movement of the barrels about the axis as they rotate with respect to the turning member. As a result, each projectile-receiving tube is delivered to the firing position.