An outdoor amusement rocking device having a frame and a support member that together form a curvature saddle-shaped play structure. The amusement device includes a hyperbole paraboloid frame structure defining an interior area and a resilient support sheet material disposed in the interior area of the frame and attached to the frame.

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. In some embodiments, the mechanical advantage device may be used to move a car or to generate power.

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. In some embodiments, the mechanical advantage device may be used to move a car or to generate power.

An outdoor amusement rocking device having a frame and a support member that together form a curvature saddle-shaped play structure. The amusement device includes a hyperbole paraboloid frame structure defining an interior area and a resilient support sheet material disposed in the interior area of the frame and attached to the frame.

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. In some embodiments, the mechanical advantage device may be used to move a car or to generate power.

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. In some embodiments, the mechanical advantage device may be used to move a car or to generate power.

A water teeter-totter system is a teeter totter that uses the inertia developed while in use to operate water pumps to pump water through a plurality of spray nozzles to combine water amusement with the fun of gliding on the device. The downward motion of each side of the teeter totter actuates a different pump to spray water alternately at one user and then at the other user. A centrally located tube is able to be coupled to various ornamentally designed appurtenances that perform an action from spraying water through the appurtenance to blowing up balloons.

A water teeter-totter system is a teeter totter that uses the inertia developed while in use to operate water pumps to pump water through a plurality of spray nozzles to combine water amusement with the fun of gliding on the device. The downward motion of each side of the teeter totter actuates a different pump to spray water alternately at one user and then at the other user. A centrally located tube is able to be coupled to various ornamentally designed appurtenances that perform an action from spraying water through the appurtenance to blowing up balloons.

A multifunctional toy for early childhood education comprises a plurality of basic elements and at least one expansion element, wherein the basic element has a rollable outer surface and an inner cavity for sleeving other basic elements, and a connector is arranged between at least two basic elements, and the connector is installed between the two basic elements in a mutually matched manner; and a plurality of steps are detachably connected on the connector, and the expansion element is detachably connected with the basic elements.