Abstract: A building system includes connectors for quickly and easily interconnecting building system parts. An expansion connector engages the apertures of two parts and expands to connect the parts. The expansion connector includes a base, an expansion element extending from a first side of the base and a receptacle extending from a second side of the base. A pin is configured to be inserted through the receptacle and the base and into engagement with the expansion element to force the expansion element into an expanded position. An alignment post may extend from the first side of the base to orient the connector relative to the parts and strengthen the connection. A thumbscrew connector includes at least one flange to engage an aperture of at least one part and includes a threaded receptacle for receiving a thumbscrew which secures the connector to the part or parts.

Abstract: A building system includes connectors for quickly and easily interconnecting building system parts. An expansion connector engages the apertures of two parts and expands to connect the parts. The expansion connector includes a base, an expansion element extending from a first side of the base and a receptacle extending from a second side of the base. A pin is configured to be inserted through the receptacle and the base and into engagement with the expansion element to force the expansion element into an expanded position. An alignment post may extend from the first side of the base to orient the connector relative to the parts and strengthen the connection. A thumbscrew connector includes at least one flange to engage an aperture of at least one part and includes a threaded receptacle for receiving a thumbscrew which secures the connector to the part or parts.

Abstract: The present disclosure relates to a connector for toy structures and educational instruments, particularly for assembling plastic and metal components. The connector includes a circular base with apertures for securing to an expansive metal construction piece by use of screws or similar threaded fasteners. The connector further includes a passageway for receiving a second construction piece, such as a plastic construction piece. Pegs pass through aligned apertures in the walls of the passageway as well as apertures in the second construction pieces, thereby securing the second construction piece to the connector.

Abstract: The present disclosure relates to a connector for toy structures and educational instruments, particularly for assembling plastic and metal components. The connector includes a circular base with apertures for securing to an expansive metal construction piece by use of screws or similar threaded fasteners. The connector further includes a passageway for receiving a second construction piece, such as a plastic construction piece. Pegs pass through aligned apertures in the walls of the passageway as well as apertures in the second construction pieces, thereby securing the second construction piece to the connector.

Abstract: The apparatus is a connector for toy structures and educational instruments, particularly for assembling plastic and metal components. The connector includes a circular base with apertures for securing to an expansive metal construction piece by use of screws or similar threaded fasteners. The connector further includes a passageway for receiving a second construction piece, such as a plastic construction piece. Pegs pass through aligned apertures in the walls of the passageway as well as apertures in the second construction pieces, thereby securing the second construction piece to the connector.

Abstract: The present disclosure relates to a connector for toy structures and educational instruments, particularly for assembling plastic and metal components. The connector includes a circular base with apertures for securing to an expansive metal construction piece by use of screws or similar threaded fasteners. The connector further includes a passageway for receiving a second construction piece, such as a plastic construction piece. Pegs pass through aligned apertures in the walls of the passageway as well as apertures in the second construction pieces, thereby securing the second construction piece to the connector.