A modular construction kit includes modular construction blocks, each includes at least one interface face. The interface face includes a recess, a plurality of connection apertures disposed proximate to the edge of the recess, and a circular interface receptacle disposed in the center of the recess. The kit also includes modular construction connectors, each includes two opposite sides, wherein each side including a body, a plurality of connection studs extending outwardly from the body, and a protrusion extending outwardly from the body. Some modular construction blocks include predetermined functions. A modular system block includes at least a processor, storage, and wireless communication.

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 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.

A connector joint device for connecting rods or arms at a joint or intersection. The connector joint includes more than one hexagon shape faces, more than one octagon shape faces, more than one 4-sided polygon shape faces. A first face among the more than one octagon shape faces has a hole extending in a direction at an angle with respect to a perpendicular line to the first face.

The invention is a construction toy consisting of standard connector elements, e.g., rings, and strut elements, e.g., that may be joined in various angular configurations and with various types of articulation such as fixed, sliding, swinging, spinning, etc. Rings may be provided that have pairs of perimeter orifices that are offset by different amounts wherein the different offsets provide different functionality to ring and strut assembles. Other elements may be included such as pipes, slips, caps, base components and collar components. The elements may be combined to create various forms including a figure with human traits comprised of interconnecting strips and rings of various dimensions, a decoration, a vehicle, a bird, or many other forms in accordance with a user's imagination.

A base member configured for use with a windowed magnetic tile, the base member including a tile portion having three or more outer edges configured with respective protrusions for fitting engagement with respective notches on corresponding three or more inner edges of the windowed magnetic tile; a first projection extending outwardly from a first surface of the tile portion formed by the three or more outer edges; and a first opening disposed on the first projection.

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 toy construction element includes a first face recessed from a second face by a recess height, a first peg extending from the second face, and an engaging member disposed on the first face. The first peg has a first peg height relative to the second face. The engaging member may include a column portion and a peg portion, wherein the column portion extends from a first end portion at the first face to a second end portion at which the peg portion is disposed. The column portion may have a column height substantially equal to the recess height, and the peg portion may have a peg portion height substantially equal to the first peg height. A toy construction element may be part of a toy construction assembly, in which an engaging member of the toy construction element connects to a hole defined by a flexible member.

The disclosed technology relates to a construction playset made of expanded plastic foam extrusions. These extrusions are assembled with or without fasteners into a wide variety of configurations and optionally the extrusions are cut safely to a desired size and in desired shapes.