Embodiments of the present disclosure are directed to a rotatable play device that comprises a central support post, a hub rotatably mounted to an upper end of the central support post, and an arm assembly attached to the hub and comprising a plurality of arms, a seat being suspended from the distal end of each of the plurality of arms. Rotation of the hub about the central support post causes the plurality of seats to rotate around the central support post in a substantially circular rotation path. Each of the seats may also be configured to move up and down by way of a spring assembly or a plurality of springs. Two or more seats may share the up-and-down movement in an alternating manner or each seat may be configured to have an independent up-and-down movement. In addition, each of the seats may optionally be configured to swing in substantial alignment with the circular rotation path and/or to swing outward due to centripetal forces created by the circular rotation path.

Embodiments of the present disclosure are directed to a rotatable play device that comprises a central support post, a hub rotatably mounted to an upper end of the central support post, and an arm assembly attached to the hub and comprising a plurality of arms, a seat being suspended from the distal end of each of the plurality of arms. Rotation of the hub about the central support post causes the plurality of seats to rotate around the central support post in a substantially circular rotation path. Each of the seats may also be configured to move up and down by way of a spring assembly or a plurality of springs. Two or more seats may share the up-and-down movement in an alternating manner or each seat may be configured to have an independent up-and-down movement. In addition, each of the seats may optionally be configured to swing in substantial alignment with the circular rotation path and/or to swing outward due to centripetal forces created by the circular rotation path.

A playground structure may include a body, a piezoelectric sensor carried by the body and configured to detect a touch input on adjacent portions of the body, and an output device configured to generate audio indicators. The playground structure may include a controller coupled to the output device and the piezoelectric sensor and configured to selectively change the audio indicators based upon the touch input.

Embodiments of the present disclosure are directed to a rotatable play device that comprises a central support post, a hub rotatably mounted to an upper end of the central support post, and an arm assembly attached to the hub and comprising a plurality of arms, a seat being suspended from the distal end of each of the plurality of arms. Rotation of the hub about the central support post causes the plurality of seats to rotate around the central support post in a substantially circular rotation path. Each of the seats may also be configured to move up and down by way of a spring assembly or a plurality of springs. Two or more seats may share the up-and-down movement in an alternating manner or each seat may be configured to have an independent up-and-down movement. In addition, each of the seats may optionally be configured to swing in substantial alignment with the circular rotation path and/or to swing outward due to centripetal forces created by the circular rotation path.

A mechanical advantage device includes a base, a beam pivotably connected to the base at a fulcrum between a first end of the beam and a second end of the beam, a seat at the first end of the beam, and a load at the second end of the beam. In some embodiments, the mechanical advantage device includes structure, such as a linkage, for effecting oscillation of the beam by shifting weight along the beam. The mechanical advantage device may be a single-person seesaw.

A mechanical advantage device includes a base, a beam pivotably connected to the base at a fulcrum between a first end of the beam and a second end of the beam, a seat at the first end of the beam, and a load at the second end of the beam. In some embodiments, the mechanical advantage device includes structure, such as a linkage, for effecting oscillation of the beam by shifting weight along the beam. The mechanical advantage device may be a single-person seesaw.

A see-saw apparatus includes a base, a beam, a first and second carrier platform, at least one actuator, and an actuator control device. The beam, with a first and a second end, pivotally attaches to the base at a fulcrum between the first and second end. The first carrier platform couples to the first end and is configured to receive a wheelchair. The second carrier platform couples to the second end and is configured to receive a wheelchair. The at least one actuator is coupled to the beam and the base, and is configured to cause the beam to pivot between a first and a second position. The first position defines a limit of travel in a first pivotal direction, and the second position defines a limit of travel in a second pivotal direction opposite the first pivotal direction. The actuator control device couples to the at least one actuator.

A see-saw apparatus includes a base, a beam, a first and second carrier platform, at least one actuator, and an actuator control device. The beam, with a first and a second end, pivotally attaches to the base at a fulcrum between the first and second end. The first carrier platform couples to the first end and is configured to receive a wheelchair. The second carrier platform couples to the second end and is configured to receive a wheelchair. The at least one actuator is coupled to the beam and the base, and is configured to cause the beam to pivot between a first and a second position. The first position defines a limit of travel in a first pivotal direction, and the second position defines a limit of travel in a second pivotal direction opposite the first pivotal direction. The actuator control device couples to the at least one actuator.

Embodiments of the present disclosure are directed to a rotatable play device that comprises a central support post, a hub rotatably mounted to an upper end of the central support post, and an arm assembly attached to the hub and comprising a plurality of arms, a seat being suspended from the distal end of each of the plurality of arms. Rotation of the hub about the central support post causes the plurality of seats to rotate around the central support post in a substantially circular rotation path. Each of the seats may also be configured to move up and down by way of a spring assembly or a plurality of springs. Two or more seats may share the up-and-down movement in an alternating manner or each seat may be configured to have an independent up-and-down movement. In addition, each of the seats may optionally be configured to swing in substantial alignment with the circular rotation path and/or to swing outward due to centripetal forces created by the circular rotation path.

A portable, folding dog agility teeter is disclosed. The teeter has two boards which are connected by a hinge. A pair of legs are also hinged. Each board can be reversibly fixed in relation to the hinge so the longitudinal axis of each board is parallel to the other. A fulcrum is formed where the legs attach to the hinge. One of the boards is heavier than the other so the heavier board is touching the ground when no additional load is on the other board. As a dog crosses from one board to the other, the teeter moves so the lighter board touches the ground. When the dog leaves the teeter the heavier board moves to touch the ground, thereby resetting the teeter for repeated use.