In a system having multiple coupling elements configured for single-handed coupling and single-handed de-coupling, each coupling element includes a body portion defining an opening and having a base configured to be free-standing. The body portion has an outer limb defining a hook member and at least one slot formed therein, the respective slot of a second initially free-standing coupling element being accessible to the respective hook member of a first suspended coupling element or vice versa. The coupling elements being configured so that mutual points of contact between the first and second coupling elements are maintained during both lifting and lowering the second coupling element thereby facilitating a one-handed intercoupling or decoupling operation with respect to a free standing coupling element disposed upright on a horizontal support surface.

In a system having multiple coupling elements configured for single-handed coupling and single-handed de-coupling, each coupling element includes a body portion defining an opening and having a base configured to be free-standing. The body portion has an outer limb defining a hook member and at least one slot formed therein, the respective slot of a second initially free-standing coupling element being accessible to the respective hook member of a first suspended coupling element or vice versa. The coupling elements being configured so that mutual points of contact between the first and second coupling elements are maintained during both lifting and lowering the second coupling element thereby facilitating a one-handed intercoupling or decoupling operation with respect to a free standing coupling element disposed upright on a horizontal support surface.

A Rubik's cube includes a plurality of blocks. Each block is spliced from a splicing piece, a central shell and a mounting base, splicing piece is mounted at top of central shell, mounting base is mounted at bottom of central shell; an outer side of central shell forms a friction surface; central shell is provided with a first mating portion, splicing piece is provided with a second mating portion fixedly connected to first mating portion by snap-fitting; bottom of central shell is provided with a third mating portion, mounting base is provided with a fourth mating portion fixedly connected to third mating portion by snap-fitting; a color piece is mounted on splicing piece, an outer side of color piece forms an exhibition surface, color piece is provided with a fifth mating portion, splicing piece is provided with a sixth mating portion fixedly connected to fifth mating portion by snap-fitting.

A child protective entertainment and dining accessory includes a base tray selectively attachable to and detachable from a dining table and configured to support at least one of food and drink for a child, and a rail elevated above and supported by the base tray onto which to secure one or more toys.

A child protective entertainment and dining accessory includes a base tray selectively attachable to and detachable from a dining table and configured to support at least one of food and drink for a child, and a rail elevated above and supported by the base tray onto which to secure one or more toys.

A Rubik's cube includes a plurality of blocks. Each block is spliced from a splicing piece, a central shell and a mounting base, splicing piece is mounted at top of central shell, mounting base is mounted at bottom of central shell; an outer side of central shell forms a friction surface; central shell is provided with a first mating portion, splicing piece is provided with a second mating portion fixedly connected to first mating portion by snap-fitting; bottom of central shell is provided with a third mating portion, mounting base is provided with a fourth mating portion fixedly connected to third mating portion by snap-fitting; a colour piece is mounted on splicing piece, an outer side of colour piece forms an exhibition surface, colour piece is provided with a fifth mating portion, splicing piece is provided with a sixth mating portion fixedly connected to fifth mating portion by snap-fitting.

A crane game is provided for amusement, training, and team building purposes. The body of the crane is suspended beneath manually held handles which are attached to the crane body by cords. Two lifting hooks are suspended beneath the crane body and operated by lifting lines which engage the crane body and extend outwardly from the crane body. Multiple persons each control a handle or lifting line and operate the crane through coordinated movement of the handles and lifting lines.

A crane game is provided for amusement, training, and team building purposes. The body of the crane is suspended beneath manually held handles which are attached to the crane body by cords. Two lifting hooks are suspended beneath the crane body and operated by lifting lines which engage the crane body and extend outwardly from the crane body. Multiple persons each control a handle or lifting line and operate the crane through coordinated movement of the handles and lifting lines.