Abstract: An in-ground trampoline system configured to provide a ground level jumping surface which consists of a trampoline, a pit, and a segmented retaining wall configured to support the walls of the pit.

Abstract: A multiuse cleaning device in a solid state containing a homogeneous quantity of cleaning agent configured to dissolve and release a substantially consistent quantity of cleaning agent over a plurality of wash and rinse cycles. The cleaning agent includes a gas-releasing component and potassium silicate as a solubility control component to limit the solubility of the cleaning agent. The cleaning agent may include other ingredients such as an alkalinity agent as a pH regulator, a water softener to solvate metal ions in a solution of water, an optical brightener, an anti-redeposition agent, fragrances, surfactants, and other ingredients. Controlled dissolution of the cleaning agent composition releases a desired quantity of cleaning agent in each cleaning cycle over a plurality of cycles. A porous enclosure may be disposed around the solid cleaning agent.

Abstract: A multiuse laundry cleaning device in a solid state containing a homogeneous quantity of cleaning agent configured to dissolve and release a substantially consistent quantity of cleaning agent over a plurality of laundry wash and rinse cycles. The cleaning agent includes a gas-releasing component, potassium silicate as a solubility control component to limit the solubility of the cleaning agent, an alkalinity agent as a pH regulator, and a water softener to solvate metal ions in a solution of water. Controlled dissolution of the cleaning agent composition releases a desired quantity of cleaning agent in each cleaning cycle over a plurality of cycles. A porous covering of bag may be disposed around the solid cleaning agent.