The present disclosure provides an inflatable pool and a method for forming an inflatable pool. A pool body includes: an annular body (11) and a bottom wall (12) connected with the annular body, wherein the annular body is configured with a first air chamber, and a pool boundary is disposed on the annular body and the bottom wall; a pair of bases (2) disposed on an end portion of the annular body opposite to the bottom wall and being spaced along a circumferential direction of the annular body; and an elastic component (3) disposed between the pair of bases along the circumferential direction of the annular body to form a shooting device. Accordingly, the present disclosure provides an inflatable pool with a new profile.

A calibration method for a camera (12) which monitors a target board (10) is disclosed, comprising the steps: using the camera to capture a target image corresponding to the target board; using rotation and translation to align the target image to a reference standard and acquire the corresponding relationship of the target image and the target board; defining a region of interest above the target image; using at least one positioning marker (28) in at least two positions of the target board, whose actual space coordinates are known, and using the camera to acquire at least two image coordinates of the positioning markers in the region of interest; and using the known actual space coordinates and the acquired image coordinates to work out the exact position of the camera. Thereby, the positions of the cameras can be used to correctly determine the positions of darts.

A game of skill, played on a generally level playing surface (10) having a firm base with a yieldable covering. A spherical ball (20) is placed on a court area (15) of the surface, and a series of toroidal rings (21 to 25) are thrown, one at a time, from one or several standard throwing distances (17, 18, 19) toward the ball in an attempt to encircle the ball with at least one ring, either by direct landing or by bouncing a ring over and around it, or by causing the ball to roll over and into a previously thrown ring. If the attempt causes a ring to rest directly against a ball or to lean on it, points are also awarded.

A toy object is presented which may be used in playing dexterity games. The toy object is shaped as a body of revolution, comprising a central disc shaped part and two opposite, mirror image tapering parts joining the central disc shaped part. It is possible that each tapering part has a frusto-conical shape with a planar top. This allows a number of toy objects to be combined into a stack of toy objects one on top of the other. Further it is preferred that the frusto-conical tapering part apart from its planar top has a concave surface. But also other shapes are possible. The dimensions may vary.

A ball throw game device (2) includes a chassis (3), a movable rack (4), a first rim set (5), a second rim set (6), and a third rim set (7). The movable rack (4) has a power unit (32) that drives the movable rack (4) to move in front-rear direction. The first rim set (5) is movable in front-rear direction by being driven by a power unit (46). The second rim set (6) is movable in left-right direction by being driven by a power unit (47). The third rim set (7) is movable in up-down direction by being driven by a power unit (48). Thus, ball shot skill of a player can be enhanced by the movements of rim hoop rings carried by the first (5), second (6), and third (7) rim sets in the front-rear, left-right, and up-down direction.

A device for playing games comprising a body portion (12) having a plurality of angularly spaced-apart, generally T-shaped members (14-22) extending therefrom. The members may be asymmetrically spaced around the body portion.

A game of skill, played on a generally level playing surface (10) having a firm base with a yieldable covering. A spherical ball (20) is placed on a court area (15) of the surface, and a series of toroidal rings (21 to 25) are thrown, one at a time, from one or several standard throwing distances (17, 18, 19) toward the ball in an attempt to encircle the ball with at least one ring, either by direct landing or by bouncing a ring over and around it, or by causing the ball to roll over and into a previously thrown ring. If the attempt causes a ring to rest directly against a ball or to lean on it, points are also awarded.