Abstract: A panel for housing a photovoltaic cell or the like, for use in combination with a toy construction set of the type having a plurality of connector elements and rod-like struts engageable with the connector elements has a panel body and a plurality of legs extending from the panel body. The legs are adapted for tight frictional engagement with cavities in the connectors and are located such that the connectors mounted thereon can be interconnected to each other using the connectors and struts so that the panel can be incorporated in an assembly comprised of a combination of the connectors and struts. Outside legs are located near the corners of the panel such that one connector can be used to join two adjacent panels. A pair of inside legs are located near the center of the panel for mounting a center connector.

Abstract: A motor for a toy construction set of the type having a plurality of connector elements and rod-like struts engageable with the connector elements to form a coherent structure wherein the connector elements have a center hub portion and a plurality of pairs of spaced-apart gripping arms adapted for lateral, snap-in engagement of the struts. The motor has a housing body and a plurality of sets of projections extending from the housing body, each of which is adapted for tight frictional engagement with a plurality of activities of the connectors. The sets of projections are located such that a connector mounted thereon can be interconnected, by said connectors and struts, to a connector mounted on another set of projections so the motor can be rigidly incorporated in an assembly comprised of a combination of the connectors and struts of the toy construction set.