An attachment apparatus provides a quick connection of the hanger tubes for a child's swing seat assembly to the pivot member of a drive mechanism powering the reciproal movement of the seat assembly. The shape of the mating attachment members, including a rounded upper portion and linear side portions, provides an intuitive and effective mounting apparatus for a swing seat assembly that can be accomplished simply by sliding the hanger tubes over or into the mating receptacles. A quick disconnect device engages automatically and provides a secure connection between the hanger tube and the receptacle. Removal of the seat assembly requires only a release of the quick disconnect device and a lifting of the seat assembly from the frame apparatus. In one embodiment the linear side portions are angled into a wedge-shape to ensure proper seating and driving connection to transmit torque to the hanger tubes.