A child play puzzle includes a set of pieces each defining a non-circular aperture therethrough. The child play puzzle also includes a base and a pole extending from the base along a pole axis. The pole sequentially receives each piece of the set of pieces with the pole extending through the aperture of each piece to form a stack of the pieces along the pole. The pole has multiple sections spaced along its length. Each section is of non-circular cross-section in a plane perpendicular to the pole axis. At least one of the sections is rotatable about the pole axis with respect to an adjacent one of the sections, such that moving a piece from about the rotatable section to about the adjacent section requires rotationally aligning the rotatable section with the adjacent section.

A kit for storing a string of characters, and method for using the kit, such as for storing a cryptocurrency seed phrase. The kit includes at least one rod having a length and a non-round cross-sectional geometry, a plurality of disks each having a hole defining a non-round geometry dimensioned to receive the rod in a plurality of orientations, and a mechanism for securing a selected subset of the disks on the rod. A plurality of characters are visibly disposed on the outer periphery of each disk such that when mounted on the rod, a selected one of the characters is non-rotatably oriented facing a predetermined radial direction. The kit may include a rack for holding multiple rods.

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.

A multi-layer toy having at least one outer layer adjacent a planar layer or a ball where both the outer layer and the adjacent planar layer or ball each contain related information such that, in play, the information on the outer layer is made to align with the related information on the adjacent planar layer or ball. The information can comprise depictions of objects, things, characters, animals, or words, for a matching game, or the information can comprise numbers for a counting or mental math game. The toy is preferably sized to be hand-held.

A multi-layer toy having at least one outer layer adjacent a planar layer or a ball where both the outer layer and the adjacent planar layer or ball each contain related information such that, in play, the information on the outer layer is made to align with the related information on the adjacent planar layer or ball. The information can comprise depictions of objects, things, characters, animals, or words, for a matching game, or the information can comprise numbers for a counting or mental math game. The toy is preferably sized to be hand-held.

A child play puzzle includes a set of pieces each defining a non-circular aperture therethrough. The child play puzzle also includes a base and a pole extending from the base along a pole axis. The pole sequentially receives each piece of the set of pieces with the pole extending through the aperture of each piece to form a stack of the pieces along the pole. The pole has multiple sections spaced along its length. Each section is of non-circular cross-section in a plane perpendicular to the pole axis. At least one of the sections is rotatable about the pole axis with respect to an adjacent one of the sections, such that moving a piece from about the rotatable section to about the adjacent section requires rotationally aligning the rotatable section with the adjacent section.

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

A three-dimensional platform comprising a tessellated surface of pieces, each piece comprising a top and sides. The pieces comprise a fixed square piece having at least two opposing sides orientated acutely relative to the top to define a fixed square retention surface. The remaining surfaces orientate substantially perpendicular relative to the top. There is a mobile square piece having at least two opposing sides orientated obtusely relative to the top to define a mobile square retention surface. The remaining surfaces are oriented substantially perpendicular relative to the top. A mobile triangular piece having all sides orientated obtusely relative to the top. The fixed square retention surface indexes only with either the mobile square retention surface or the triangular piece surface to effect retention of the pieces to define the three-dimensional platform.

In order to provide a puzzle that allows young children to enjoy puzzle games easily and pleasantly, a puzzle 1 has a housing main body 10 and a puzzle shaft 40 provided in the housing main body 10. The puzzle shaft 40 includes a shaft and a piece 30. The shaft is provided with rotation of the shaft centers fixed. A plurality of pieces that is rotatably provided around the shaft center of the shaft along a shaft center direction of the shaft via the shaft and a ratchet mechanism, and puzzle patterns are provided to outer periphery of the shaft around the shaft center. The ratchet mechanism is made up of ratchet teeth formed on the outer periphery of the shaft and a ratchet pawl provided to the piece via an elastic portion.

In order to provide a puzzle that allows young children to enjoy puzzle games easily and pleasantly, a puzzle 1 has a housing main body 10 and a puzzle shaft 40 provided in the housing main body 10. The puzzle shaft 40 includes a shaft and a piece 30. The shaft is provided with rotation of the shaft centers fixed. A plurality of pieces that is rotatably provided around the shaft center of the shaft along a shaft center direction of the shaft via the shaft and a ratchet mechanism, and puzzle patterns are provided to outer periphery of the shaft around the shaft center. The ratchet mechanism is made up of ratchet teeth formed on the outer periphery of the shaft and a ratchet pawl provided to the piece via an elastic portion.