An environmentally friendly knockdown building block set includes a cardboard shipping box; a plurality of main cardboard blanks each configured to form a base block including four connecting slots therein as wide as the base block thickness; a plurality of coupling cardboard blanks each configured to form an H-block including two connecting slots therein with each slot located between two legs of the H-block and as wide as the H-block thickness; wherein the connecting slots of each base black and each H-block allow for receipt and interconnection of the base block or H-block with an associated base block or H-block forming a notched connection for the base blocks and H-blocks; wherein at least the main blocks include an inking pattern using plant based environmentally friendly inks; and wherein the shipping box is an integral component configured to be integrated into structures formed by the set.

A tooth-meshing rolling toy set includes at least one curved carrier member and at least one rolling member. The at least one curved carrier member has a first surface and an opposite second surface; and the first and the second surface all are provided with a toothed structure having a plurality of teeth. The at least one rolling member includes a rolling body having a peripheral surface extending around the rolling body to define a closed geometric loop having a curved surface. The peripheral surface is also provided with a toothed structure having a plurality of teeth that mesh with the teeth of the toothed structure on the curved carrier member, such that the at least one rolling member can roll on the first surface or the second surface of the at least one curved carrier member through meshing with the at least one curved carrier member.

A structure for coupling assembly blocks of a polyhedral shape formed of a plurality of side plates, a top plate, and a bottom plate, includes a first coupling member formed on a portion of at least one of the plurality of side plates, the top plate, and the bottom plate and a second coupling member formed on a portion of at least one of the plurality of side plates, the top plate, and the bottom plate other than one on which the first coupling member is formed. The first coupling member of one assembly block is configured to couple with the second coupling member of other assembly block in a sliding manner, in a fitting manner, or in a rotating manner.

A container adapter includes a soft sleeve having a first and a second anti-slide sleeve portion; a rigid connecting pipe having a coupling portion, a stop portion and a plurality of slots. The first anti-slide sleeve portion is forward tapered, and the coupling portion is backward flared. The rigid connecting pipe is connected at the coupling portion to the first anti-slide sleeve portion of the soft sleeve with the stop portion abutted on a rim of the first anti-slide sleeve portion. To use the container adapter, simply fit the second anti-slide sleeve portion of the soft sleeve around an end of a container. Decorative accessories can be set in the slots to form ornaments, or pipes can be connected to the container adapter to form a fluid passage for guiding a liquid in the container, such that the container can have more applications and be advantageous to environmental protection.

The present invention relates to a cubic element for construction toys, including three, straight, open-ended channels each formed on an adjacent different face of the cube between two opposite faces of the cube and extending in orthogonal opposite directions to each other (X,Y,Z). Each channel includes a bottom wall and two upwardly extending parallel sidewalls, wherein the width of the bottom wall and the distance between the face which is distal to the channel that is extending orthogonally from the same cube face, and the sidewall adjacent the distal face, are substantially equal.

A system for building a load bearing structure for supporting a compressive load, the system including a plurality of wooden members; wherein a protrusion of a second member is locatable within a recess of a first or third member to interconnect the first and second or third and second members together to form the loading bearing structure, wherein the protrusion is not rotatable within the recess, and; wherein the third member has a recess with a depth greater than the height of the protrusion of the second member such that a cavity is formed between an upper inner wall of the third member and a top portion of the protrusion of the second member when the second and third members are interconnected.

The invention describes a new constructor module with the additive aspects of sound and dynamic construction. A base block is provided with varying mating elements for adjustably connecting structural blocks and plates together with sounding elements. A plurality of base blocks may be constructed based on desired output in various shapes and structures. The base blocks are coupled together with connecting elements and fixing pins, which also assist in coupling the sounding elements. Additional plates are also utilized for creating dynamic sounds and structures, including D-shaped plates and U-shaped plates. Constructor set modules may utilize all such elements in a plurality of structures, or at minimum, only base blocks, connecting elements, a sounding element, and fixing pins.

A block may comprise a base comprising a first block side comprising a first side plane and a connective protrusion coupled to the base and extending distally outwardly and substantially perpendicularly from the first side plane. The connective protrusion may comprise a center pillar coupled to the base extending distally outward from the first side plane, a base portion coupled to the center pillar and the base and extending axially and substantially perpendicularly from the center pillar in a first direction, and an overhang portion coupled to the center pillar extending axially and substantially perpendicularly from the center pillar in a second direction opposite the first direction such that there is an overhang space between the first side plane and the overhang portion. The block may further comprise additional connective protrusions, and the connective protrusions of multiple blocks may enable the coupling of such blocks.

Disclosed herein is a toy building unit for playing capable of folding from a flat position into a three-dimensional hollow position.

The application relates to a field of object connection and in particular, relates to a basic connecting block and a connecting block group. The basic connecting block includes a connecting block body, wherein at least one protrusion corner is provided on one side of the connecting block body and same number of inward recesses as the protrusion corner are provided on an opposite side of the connecting block body, and wherein a surface contour of the protrusion corner is consistent with that of the inward recess, the protrusion corners are connected with each other and the inward recesses are communicated with each other.