A thermal compensation system is provided for a liquid-filled inflexible chamber of a device. The chamber has at least one exposed, at least partially transparent surface allowing an outside observer to observe at least one liquid and comprises a mechanism accommodating thermal expansion and/or contraction of the liquids. The mechanism is disposed so as to be substantially invisible to the observer.

A visual art piece comprises a plurality of transparent sheets, wherein at least one of the plurality of transparent sheets comprises cutouts forming an upper reservoir, a lower reservoir and a channel between the upper reservoir and the lower reservoir, wherein the cutouts are filled with a first liquid and a second liquid. The visual art piece also includes a plurality of scenery image layers depicting a natural scene, each of the plurality of scenery image layers comprising a portion of the natural scene at a different visual depth, wherein each of the plurality of scenery image layers is affixed between two of the plurality of transparent sheets. The visual art piece further includes a pump coupled to the at least one of the plurality of transparent sheets, the pump to propel the second liquid from the lower reservoir to the upper reservoir when activated, the second liquid to flow through the first liquid in the channel from the upper reservoir to the lower reservoir to visually simulate natural water movement in the natural scene.

A scene decoration article includes an outer housing, a cover part, and a driving device. The outer housing is provided with a first inner side wall and a first outer side wall. The first inner side wall surrounds and forms a first accommodating cavity. The first accommodating cavity is used for accommodating liquid. A surface of the first inner side wall is recessed to form an installation inner wall. The cover part is configured for covering the installation inner wall to form a water intake cavity between the cover part and the installation inner wall. The cover part is provided with a first water inlet. The installation inner wall is provided with a first water outlet. The first accommodating cavity, the first water inlet, the water intake cavity, and the first water outlet are in communication with each other.

A decorative, wearable system includes at least one decorative element mechanically and moveably suspended in a liquid by mechanical fixation elements. The liquid shares a substantially similar refraction index as at least one of mechanical fixation elements.

A decorative, wearable system includes at least one decorative element mechanically and moveably suspended in a liquid by mechanical fixation elements. The liquid shares a substantially similar refraction index as at least one of mechanical fixation elements.