A self-adhesive stacked set including a plurality of stacked bodies is provided. The plurality of stacked bodies form a three-dimensional geometry, and a top view shape of the plurality of stacked bodies includes a triangle and a quadrangle. Each of the stacked bodies includes a plurality of stacked layers, and the plurality of stacked layers are stacked on each other. A rear surface of each of the stacked layers has an adhesive region, and the plurality of stacked layers are stuck to each other via the adhesive region.

A panel and a system for use in building a lightweight structure are provided. The panel, made of a film or a sheet capable of being curved or bent with fingers, includes a body in a geometric shape circumscribed by straight or curved edges, and at least one joint formation along the edge for panel connection. The joint formation has tabs separated by at least one gap. Each tab expands bilaterally and proximally from the body at its base, and each gap is positioned along the edge so as to accept the base of the tab. The joint formations along the edges of varied curvatures are alignedly, hingedly, and detachably interlocked with each other by twisting the panels with fingers to individually hook the tab at the gap. The panels are assembled into geometric structures having flat or curved faces.

A puzzle kit and a puzzle constructed from said puzzle kit. The puzzle kit comprises a three dimensional substrate having an outer surface, and a plurality of puzzle pieces that cannot interlock. Each puzzle piece has a first surface and an opposite second surface and a thickness defined between the first and second surfaces. Each puzzle piece comprises first attachment means and the outer surface of the substrate defines a plurality of complementary second attachment means, such that the first attachment means and the second attachment means magnetically attach each puzzle piece to the outer surface. The first attachment means comprises a projection extending from the second surface of the puzzle piece. The second attachment means comprises a hole to partly receive the projection.

A globe can include a plurality of pieces structured to inter-attach to form a surface of the globe, and an attachment system. Each piece can be substantially rigid, and can have an outer major surface shaped to form a portion of the surface of the globe. The plurality of pieces can include a first quantity of substantially identically-shaped polygonal pieces. The attachment system can be configured to attach at least some adjacent edges of the pieces, and can attach at least one edge of each of the pieces to an adjacent edge of another of the pieces. The attachment system can be configured such that the globe has sufficient structural integrity to substantially maintain a globular shape under its own weight. Each of a majority of the pieces can include a printed image on its outer major surface that is different than any printed image of any other piece.

Systems, devices, and methods including one or more code rings, each code ring comprising one or more sides on an outer surface and one or more code ring alignment indentations on an inner surface; and one or more inner combination rings, each inner combination ring comprising one or more inner combination ring alignment protrusions on an outer surface and a combination indentation on an inner surface; where each of the one or more code ring alignment indentations receive each of the one or more inner combination ring alignment protrusions, where each inner combination ring may be removable and rotatable relative to each code ring of the one or more code rings, and where the combination indentation may be proximate an unlocked side of each of the one or more code rings

Puzzle kits include a first puzzle and a second puzzle, each of which is formed of a plurality of polyhedral modules, or polyhedrons, connected by hinges in a continuous loop. Each polyhedron includes four faces, six edges, and at least one magnet disposed adjacent to at least one face. Magnetically stabilized assemblies of the first puzzle and the second puzzle form at least a convex polyhedrons, such as a cube.

A multiple rhombic dodecahedron puzzle includes a plurality of wooden puzzles arranged in a multiple rhombic dodecahedron. The multiple rhombic dodecahedron is equivalent to a cube formed by a plurality of rhombic dodecahedrons connecting to each other. Each of the wooden puzzles includes two unit elements. The two unit elements are connected to each other and are the same others. Each of the two unit elements has a plurality of surfaces. Each of the surfaces has a diamond shape or a triangular shape. Two of the surfaces which in the triangular shape are connected to each other in order to form a concave shape, and the surfaces are surrounded to form a closed space.

A bottle puzzle used as a training or learning tool for children and adults with cognitive disabilities has puzzle pieces with uniquely shaped concave and convex walls, with only one wall in one puzzle piece matching another wall in a different puzzle piece. Each puzzle piece is a fully contained compartment capable of holding and dispensing beverages. When puzzles are put together, they form a normal bottle that can be filled with beverages contained in the puzzle pieces. A mixing chamber allows consuming several beverages contained in the puzzle pieces simultaneously.

A three-dimensional logic puzzle is provided. The puzzle includes a plurality of identically shaped puzzle components of an irregular form. Each puzzle component is configured to engage with another identically shaped puzzle component via projections and recesses formed on the sides of the puzzle components. The plurality of puzzle components are interengagably assembled into the form of a predetermined three-dimensional geometric shape.

A toy construction craft utilizing construction elements including modular building blocks comprises a base plate usable with a template that directs the user to create a scene and/or usable with a base joiner that enables multiple base plates to be removably connected to form a larger playing surface. The base plate comprises a flat base and an outer flange. The flat base includes a substantially planar building surface configured with forward-facing coupling studs for being interconnected with toy building elements having complementary coupling means, and the flat base includes rearward-facing protrusions that can interface with the template and/or with the base joiner. Additional optional accessories and specialized blocks are also provided, including one or more graphic segments and a frame.