A toy building block set includes a socket block piece and at least one of first and second plug block pieces. The socket block piece has a socket wall body and at least one engaging hole of a regular polygonal shape. Each of the first and second plug block pieces has a plug body and at least one polygonal insert plug configured to be inserted into and in frictional engagement with the engaging hole with a first frictional force to permit rotation of the plug block piece relative to the socket block piece by a forcible torque and to keep a predetermined angle of the plug block piece relative to the socket block piece when the forcible torque is removed. The plug body is partially inserted into and in frictional engagement with the engaging hole with a second frictional force larger than the first frictional force.

A connector includes a body that extends along a longitudinal axis from one end-face to an opposite end-face. The body has an inner surface and an outer surface, and defines a first raised block, a second raised block, and first recesses in at least one end face. The first and second raised blocks each respectively extend from the outer surface perpendicular to the longitudinal axis. The first raised block includes a first planar surface and defines protrusions that extend from the first planar surface. The second raised block includes a second planar surface and defines second recesses within the second planar surface. Each of the body, the first recesses, the first protrusions, and the second recesses separately defines a respective structural interface. Each structural interface is configured to engage with a respective corresponding structural interface of a component and couple that component to the connector.

A connector includes a body that extends along a longitudinal axis from one end-face to an opposite end-face. The body has an inner surface and an outer surface, and defines a first raised block, a second raised block, and first recesses in at least one end face. The first and second raised blocks each respectively extend from the outer surface perpendicular to the longitudinal axis. The first raised block includes a first planar surface and defines protrusions that extend from the first planar surface. The second raised block includes a second planar surface and defines second recesses within the second planar surface. Each of the body, the first recesses, the first protrusions, and the second recesses separately defines a respective structural interface. Each structural interface is configured to engage with a respective corresponding structural interface of a component and couple that component to the connector.

Provided herein is a set of card-like structure and connector toys for building; the set comprising one or more card-like structures and one or more end cap connectors, wherein the one or more end cap connectors comprise one or more slots for inserting the card-like structures. Also provided herein is a connector toy or a kit of connector toys; comprising one or more slots for inserting card-like structures for building.

Provided herein is a set of card-like structure and connector toys for building; the set comprising one or more card-like structures and one or more end cap connectors, wherein the one or more end cap connectors comprise one or more slots for inserting the card-like structures. Also provided herein is a connector toy or a kit of connector toys; comprising one or more slots for inserting card-like structures for building.

A constructional toy comprising a plurality of elements which can be assembled together to form a variety of three dimensional structures. The elements include a triangular prism shaped brick element comprising a plurality of walls. The walls define a male mating side having a male engagement feature which extends from the brick. The walls also define a female mating side which defines a cavity configured for receiving an engagement feature of the same configuration as provided on the male mating side.

Embodiments include a construction toy kit having component parts capable of being assembled in a configuration chosen by the user. The kit may contain a connector extending from a first end to a second end, having a securement comprising a first retainer feature, a second retainer feature and a third retainer feature. The connector may further have a first grip extending from the first end toward the securement, where the first grip is sized to receive a feature of a building panel. The kit may also contain a multiple building panels of various configurations, a mat used as a base for erecting a structure and multiple sensor components. These components among others may be assembled to create structure such as a race course for robotic toys. The sensor elements may be implemented by the user to sense various actions of the robotic toy, and respond as chosen by the user.

Building sets including one or more blocks or planks and one or more connector clips configured to engage a thickness of the planks. Various types of planks, as well as various types of connecting clips may be provided, so as to provide open-ended building characteristics to users. Some connector clips may include a mating protrusion allowing the connector clip to be coupled to a hole or receptacle of another connector clip, or hub for connector clips, or into a hole of a plank. Such clips may be pivotable relative to the structure coupled to as a result of the mating protrusion connection. The building sets may provide proportional dimension characteristics between the planks and various connector clips, hubs, etc. One or more button connector clips may be provided with one or more panels, allowing panels to be integrated into the structural framework created with the connector clips and planks.

A chain-shaped splicing toy is attached to a ball so that a plurality of balls can be spliced with each other. The chain-shaped splicing toy includes a first chain assembly. The first chain assembly has two first coupling portions, a first ring, two first buckling portions, and a plurality of first chain connecting portions. Wherein, when the first chain assembly is attached to the ball, the first coupling portion at one end is coupled to the first ring at the other end. The first buckling portions are buckled to the first coupling portion that is not located at one end of another first chain assembly attached to the other ball so that the balls can be spliced with each other in different shapes and models.

A chain-shaped splicing toy is attached to a ball so that a plurality of balls can be spliced with each other. The chain-shaped splicing toy includes a first chain assembly. The first chain assembly has two first coupling portions, a first ring, two first buckling portions, and a plurality of first chain connecting portions. Wherein, when the first chain assembly is attached to the ball, the first coupling portion at one end is coupled to the first ring at the other end. The first buckling portions are buckled to the first coupling portion that is not located at one end of another first chain assembly attached to the other ball so that the balls can be spliced with each other in different shapes and models.