A building block of six female sides wherein each side of the block is adapted to accept a male side of a second different block. The first block is made up of a cross form comprised of tubular projections, a skeleton block form, and connection components connecting the cross form to the skeleton block form. The second different blocks are made up of at least four generally cylindrical projections extending normally outward from the base plate of the block that may be inserted into any of the six sides of the first block and interconnect by frictional engagement. These blocks can be interconnected and assembled into a block structure that has both a finished outward appearance in which each outermost side of every block is customizable and provides internal passageways for adding structural elements, wiring, lighting or anything else needed to run through the blocks and block structure.

A flexible interconnectable brick assembly includes a connector panel having a top side, a bottom side and a perimeter edge. The connector panel is resiliently flexible and is comprised of an elastomeric material. The perimeter edge includes a first end edge, a second end edge, a first lateral edge and a second lateral edge. A top adhesive is positioned on and covers the top side of the connector panel. A plurality of female interconnection members is positioned on the bottom side of the connector panel and each releasably and frictionally receives a male interconnection member of a brick.

A toy construction set includes first and second construction elements, a pin, and a fastener including a body and a head. Each of the first and second construction elements includes through-holes and grooves on two major surfaces, respectively, of the construction element. A thickness of each groove is substantially the same. At at least one end of each groove, an edge of the groove is curved. The pin includes a body having a cavity and a member. A first portion of an edge of the member is curved, and a second portion of the edge of the member is straight. A thickness of the member is not larger than the thickness of each groove. The member of the pin is fixed in place in one of the grooves of the first construction element when the first and second construction elements are coupled by the pin and the fastener so as to constrain the pin from rotating with respect to an axis of the body of the pin.

Interlocking panels are assembled to form modules, and the modules are assembled to form a modular display case, for displaying, transporting and storing objects such as models, display items or valuable collectibles. The interlocking panels include interlocking side edge ball key tab including a resilient, compressible ball key, and ports for removably receiving the ball key tab and ball key.

The invention relates to a toy building element for a modular building game. The toy building element comprises one or more hollow coupling studs for coupling the toy building element to another toy building element in a releasable manner. Each coupling stud extends along a respective longitudinal axis and defines internally an axial through cavity configured to receive, in a removable manner, a locking stud apt to lock the toy building element to another toy building element coupled thereto. Each coupling stud comprises a coupling part and a receiving part for receiving the coupling part of a coupling stud of another toy building element. The coupling part comprises at least a radially flexible portion for engaging/disengaging a receiving part of a coupling stud of another toy building element. The radially flexible portion is configured to cooperate with one said locking engaging the cavity so that its radial bending is limited by the locking stud so as to prevent the coupling part from disengaging from the receiving part of a coupling stud of another toy building element.

The application discloses a building block. comprising three shapes of cuboid hollowed-out building blocks, connectors and hinges, built by means of connectors and hinges. The application of a building block combination has a simple structure, a fast assembling speed, a diverse gameplay, and may effectively improve the amusement and interest in use.

A toy construction set includes first and second construction elements, a pin, and a fastener including a body and a head. Each of the first and second construction elements includes through-holes and grooves on two major surfaces, respectively, of the construction element. A thickness of each groove is substantially the same. At at least one end of each groove, an edge of the groove is curved. The pin includes a body having a cavity and a member. A first portion of an edge of the member is curved, and a second portion of the edge of the member is straight. A thickness of the member is not larger than the thickness of each groove. The member of the pin is fixed in place in one of the grooves of the first construction element when the first and second construction elements are coupled by the pin and the fastener so as to constrain the pin from rotating with respect to an axis of the body of the pin.

A set of building components is disclosed. The set includes a plurality of blocks and at least one connecting member for connecting and supporting a subset of the plurality of blocks in fixed relative position. Each of at least two of the blocks includes: a pair of parallel end faces, the end faces defining a block thickness therebetween, and a plurality of side faces extending between the end faces. Each of the at least two blocks defines three or more first holes extending between the end faces, wherein the first holes are arranged in orthogonal rows and columns and each pair of adjacent first holes extends in parallel spaced relation to each other. The at least one connecting member includes one or more rod portions that are sized to fit through the first holes of the blocks of the subset.

In one example, we describe a method and system for structural basic units and their connectivity devices, apparatuses, or systems. These can be used for games for kids or for instructional purposes for math and chemistry or physics modeling. In another application, it can be used for the real-life situations, e.g., to build strong usable structures for storage, housing, and bridges, using the fundamental bricks and modules or connectors shown here, e.g., in a large size or scale. In another application, we can put glue or cement or concrete or mortar or construction material or other adhesive, as solid or liquid or tape or fluid, between the bricks or fundamental units or pieces or joints, for better adhesion. Other variations, systems, and features are also discussed here.

The invention is a tube connector for a play structure, and a play structure system that uses such tube connectors to connect a plurality of tubes together. The tube connector has a center portion and at least one projecting member extending from the center portion. To construct a play structure, tubes are fitted over the projecting members in the tube connectors. Flexing tabs on the projecting members, which are fixed at the end of the projecting member and extend back toward the center portion, lock into openings in the tubes to secure the tubes to the projecting members and connect the tubes together into a play structure.