An interlocking rotatable assembly includes multiple interlocking pieces. Each of the interlocking pieces has a disk, a center hole formed through a center of the disk, a mounting slit radially formed in a peripheral edge of the disk, two arms, and two engaging protrusions. The arms parallelly protrude from the peripheral edge of the disk and are oppositely disposed beside the mounting slit. The engaging protrusions protrude from the arms respectively. No undercut is formed on each of the interlocking pieces. Therefore, only a female die and a male die are needed when manufacturing the interlocking pieces by injection molding process. Molds and manufacturing process for manufacturing the interlocking piece are simplified. Accordingly, mold cost and manufacturing cost of the interlocking piece are reduced, and defect-free rate of the interlocking piece can be increased.

A toy building block socket comprises a flexible body dimensioned to friction fit within a toy building block such that the flexible body has a channel formed therein, the channel extending perpendicularly from a surface of the flexible body.

A ring combination toy includes plural assembling bodies which are ring structures, each having plural first connecting portions; and plural assembling pieces, each having two connecting structures and a bent portion, and the connecting structures are connected by the bent portion to form the assembling piece, and each of the connecting structures has a second connecting portion corresponding to the respective first connecting portion. When the second connecting portions of any one of the assembling pieces is engaged to the first connecting portions of any two of the assembling bodies respectively, the assembling bodies are combined with the assembling pieces. Through the design of different shapes, the young children will not be injured easily while playing the game, and the parents can be assured to let their young children play the game and have fun freely.

A ring combination toy includes plural assembling bodies which are ring structures, each having plural first connecting portions; and plural assembling pieces, each having two connecting structures and a bent portion, and the connecting structures are connected by the bent portion to form the assembling piece, and each of the connecting structures has a second connecting portion corresponding to the respective first connecting portion. When the second connecting portions of any one of the assembling pieces is engaged to the first connecting portions of any two of the assembling bodies respectively, the assembling bodies are combined with the assembling pieces. Through the design of different shapes, the young children will not be injured easily while playing the game, and the parents can be assured to let their young children play the game and have fun freely.

A construction system includes at least two building elements provided with one or more cylindrical holes and one or more connection pins having a first end, a second end and a longitudinal axis. The connection pins are configured to be detachably inserted into the holes and hereby connect two adjacent building elements. The connection pins are provided with a first notch extending along the longitudinal axis and a second notch extending along the longitudinal axis, wherein the first notch extends from the first end to a position between the first end and the second end, wherein the second notch extends from the second end to a position between the first end and the second end. The width of the connection pins is larger than the width of the cylindrical holes.

A toy building block system comprises a plurality of interlocking building blocks with openings to receive at least one a linkage having a head portion, a tail portion opposite the head portion, a posable metal wire connecting the head portion to the tail portion, and a cross-section of the head portion, the tail portion, the posable metal wire, or combinations thereof having a major width that is between approximately 0.123 inches and approximately 0.193 inches.

Provided is a toy building system. The toy building system may comprise one or more of interconnecting tiles, flat tiles, arcs, line reactors, clips, tracks, rotatable tracks, split tracks, launchers and other pieces that are adaptable to connect in a multitude of configurations and may be set up in sequence to create a chain reaction of falling as in dominos. Various types of tiles or falling units may be utilized, including line reactors, arcs, or tiles having a multitude of different mating components and orientations including an interconnecting orientation and a flat orientation. The domino tile may further connect to other pieces of the toy building system including an arc or a rapid track builders including a track and a clip. The tiles, independently set up, as a part of the arc, or as a part of the rapid track and/or line reactors may be positioned so as to create a domino effect when a force is applied thereto, such as a force applied by a launcher. The various components and interconnectability between components allow for limitless configurations as building blocks and as a domino show.

A 3D fort building kit is a device that can create a variety of structures and shapes. In other words, the device has improved materials and designs with better qualities, that enables kids to build complex 3D structures. To accomplish this, the device includes panels, connectors and utility features that help kids to construct and assemble a structure of their choice in many designs. Further, structures may be constructed in many creative designs by allowing the panels to be connected vertically, horizontally, and at any angle. Furthermore, the constructed structures can be disassembled and constructed again to build other designs safely by kids. Additionally, the device is simple, durable, and light weight enough for young kids to build stable and versatile structures of their choice.

A building model connector is disclosed comprising a central body, an arm extending outwardly from the central body, the arm including a first arm portion, and a second arm portion, and first and second gripping teeth formed at the distal end of the first arm portion and the second arm portion, respectively, on the inner surface thereof. The first and second gripping teeth are configured to removably connect to a form such as a building panel. Corresponding systems and methods also are disclosed.

A system of interlocking blocks and rods or tubes for rapid assembly of component infrastructures, where one or more of those components have electronics, power or other instrumentalities built into the component during manufacture, such as by 3-D printing, and the components thereof and methods therefor. The rods or tubes, blocks (for interlocking the rods/tubes) and through-holes allow not only structural stability but interconnectivity of electricity, power or other functionalities. The methodology of the present invention provides a paradigm for modeling more costly and complicated systems. Also, product packaging for products made pursuant to the present invention is scaled so as to be usable in the application of the parts.