A set of two or more whistles. Each whistle of the set sounds differently from each other based on a different type of sound or a different value of a characteristic of sound common to whistles of the set. Sound characteristics may include but not limited to pitch, quality, loudness, and/or duration. Each whistle in the set may be different in appearance from each other in the set. Appearance characteristics may include but not limited to color, numbering, design, light up features, size, and/or shape. Alternatively, the whistles in a set may have a common appearance characteristic, but each whistle may have its own value of the common appearance characteristic. Additional element(s) such as lanyards or mouthpieces may be added to whistles of a set to distinguish them from each other. The set of whistles may be included in a kit having a box for removably storing the whistles.

A trampoline includes a bounce fabric, a plurality of fabric clamps and a fixed frame. The bounce fabric is connected to the fabric clamps, and one end of the fabric clamp is connected to one end of a spring. The fixed frame includes connectors and frame grooved pipes. The surface of the frame grooved pipe is provided with a grooved-pipe horizontal channel, and the other end of the spring is connected to the grooved-pipe horizontal channel on the surface of the frame grooved pipe. The connector is provided with a grooved-pipe connecting end and a support-pipe connecting end. The inner side of the grooved-pipe connecting end is provided with a through hole, and the surface of the grooved-pipe connecting end is provided with a groove. One end of the frame grooved pipe is arranged in the through hole. The groove is arranged in the grooved-pipe horizontal channel.

A set of two or more whistles. Each whistle of the set sounds differently from each other based on a different type of sound or a different value of a characteristic of sound common to whistles of the set. Sound characteristics may include but not limited to pitch, quality, loudness, and/or duration. Each whistle in the set may be different in appearance from each other in the set. Appearance characteristics may include but not limited to color, numbering, design, light up features, size, and/or shape. Alternatively; the whistles in a set may have a common appearance characteristic, but each whistle may have its own value of the common appearance characteristic. Additional element(s) such as lanyards or mouthpieces may be added to whistles of a set to distinguish them from each other. The set of whistles may be included in a kit having a box for removably storing the whistles.

A set of two or more whistles. Each whistle of the set sounds differently from each other based on a different type of sound or a different value of a characteristic of sound common to whistles of the set. Sound characteristics may include but not limited to pitch, quality, loudness, and/or duration. Each whistle in the set may be different in appearance from each other in the set. Appearance characteristics may include but not limited to color, numbering, design, light up features, size, and/or shape. Alternatively; the whistles in a set may have a common appearance characteristic, but each whistle may have its own value of the common appearance characteristic. Additional element(s) such as lanyards or mouthpieces may be added to whistles of a set to distinguish them from each other. The set of whistles may be included in a kit having a box for removably storing the whistles.

A batting cage assembly including a plurality of upright frames to support a batting cage net, where the plurality of upright frames are interconnected using cross members that include two vertical end segments and a horizontal segment positioned between the two corresponding vertical end segments. A batting cage net is connected to the plurality of upright frames.

A training apparatus for fast-rope training includes a platform-supporting structure having one or more containers and at least one platform configured for use in fast-rope training. At least one attachment is provided for attaching a fast-rope. The platform-supporting structure is supportable by a surface. The at least one attachment is located higher than the platform and spaced laterally from the platform-supporting structure such that the at least one attachment overhangs the surface so a fast rope can hang from the at least one attachment, past the platform and toward the surface.

A portable base anchoring system includes an anchor and fasteners. The anchor includes a base plate and a block. The base plate defines holes and is configured for placement on a playing surface. The block extends upwardly from an upper surface of the base plate and is configured for insertion into a socket on a bottom surface of a base. Each of the fasteners is configured for insertion into one of the holes to secure the base plate to the playing surface.

System and method for launching a ball onto the ground of a playing field. The system includes an outlet chamber configured to receive the ball therein; an outlet conduit or frame configured to contain the outlet chamber and allow the same to move through the outlet conduit towards a second position on the ground; movement capability of the outlet chamber, connected to and configured to move the outlet chamber between at least the first position and the second position, where the outlet chamber includes an outlet mouth and launching means for launching the ball arranged in the outlet chamber. A field including the system is also described.

System and method for launching a ball onto the ground of a playing field. The system includes an outlet chamber configured to receive the ball therein; an outlet conduit or frame configured to contain the outlet chamber and allow the same to move through the outlet conduit towards a second position on the ground; movement capability of the outlet chamber, connected to and configured to move the outlet chamber between at least the first position and the second position, where the outlet chamber includes an outlet mouth and launching means for launching the ball arranged in the outlet chamber. A field including the system is also described.

A retractable sports goal includes a base housing and a goal frame. The housing includes first and second post sections and a crossbar housing section. The goal frame includes first and second goal posts and a crossbar. The goal frame has a playing position and a retracted position. In the playing position the crossbar is extended vertically away from the crossbar housing section and the first and second goal posts are respectively extended from the first and second goal post housing sections. In the retracted position the crossbar is disposed in the crossbar housing section and the first and second goal posts are respectively disposed in the first and second goal post housing sections. A cover plate includes portions that surround the goal posts. Wheels may be attached to the bottom portions of the goal posts. A counter-weight may be provided to bias the goal frame towards the playing position.