A sub-irrigation system includes a special water distribution assembly that is able to rapidly disperse water underneath a court surface. The system has a water distribution assembly with a water channel and permeable fabric covering. The system also includes an electronic control system to monitor and maintain a desired moisture content of a court. Inevitable variations resulting from manual and gravity fed water control only are moderated or eliminated by the automatic control herein.

A sub-irrigation system includes a special water distribution assembly that is able to rapidly disperse water underneath a court surface. The system has a water distribution assembly with a water channel and permeable fabric covering. The system also includes an electronic control system to monitor and maintain a desired moisture content of a court. Inevitable variations resulting from manual and gravity fed water control only are moderated or eliminated by the automatic control herein.

A martial art concept playpen arrangement provided with walking surface having material quality being suitable for the children, and with padded columns making up its frame and providing its stability. The net and/or padded stretching rope are located between the columns which serve safety and stability purposes, as well. The external look of the playpen is designed based on the form of the usual playing field or ring used in the martial arts.

A martial art concept playpen arrangement provided with walking surface having material quality being suitable for the children, and with padded columns making up its frame and providing its stability. The net and/or padded stretching rope are located between the columns which serve safety and stability purposes, as well. The external look of the playpen is designed based on the form of the usual playing field or ring used in the martial arts.

A digital video ramp assembly incorporates process-formed structural LED tiles with modular components that join in a system of scalable structural LED tiles forming a complete LED display structure with integrated LED embedded tiles with interlocking and inter-trans-positioning features sometimes requiring additional structural framing.

A digital video ramp assembly incorporates process-formed structural LED tiles with modular components that join in a system of scalable structural LED tiles forming a complete LED display structure with integrated LED embedded tiles with interlocking and inter-trans-positioning features sometimes requiring additional structural framing.

The movable track for barefoot walking is designed to provide healthy exercise and to prevent and heal chronic and casual diseases by walking in bare feet while executing a marathon on the movable track. The movable track for barefoot walking includes a movable/portable, lightweight, waterproof, fiberglass platform or base having a connected assembly of waling surface sections thereon. Each section has unique physical and medical benefits for use by a marathoner. The sections include: a first section having high and low areas of ground; a gravel and stone section; a sand section; a grass section; a water section; and a clay section. Provisions are made within the confines of the track for a water tank, pumping capabilities, clothing storage, bath facilities and appropriate controls.

The movable track for barefoot walking is designed to provide healthy exercise and to prevent and heal chronic and casual diseases by walking in bare feet while executing a marathon on the movable track. The movable track for barefoot walking includes a movable/portable, lightweight, waterproof, fiberglass platform or base having a connected assembly of waling surface sections thereon. Each section has unique physical and medical benefits for use by a marathoner. The sections include: a first section having high and low areas of ground; a gravel and stone section; a sand section; a grass section; a water section; and a clay section. Provisions are made within the confines of the track for a water tank, pumping capabilities, clothing storage, bath facilities and appropriate controls.

A modular structure for installing an artificial playing field comprising: a stabilizing layer forming a plurality of compartments for receiving a granular infill; a separation layer for location over the stabilizing layer to retain the infill; a water distributing layer; and an artificial turf layer. The claimed construction allows a stable base layer to be formed using virtually any locally available granular material such as earth, gravel, lava, rock and the like. The compartments ensure that the granular material is held in place and cannot be displaced due to loading or washed away due to rain or flooding.

A modular structure for installing an artificial playing field comprising: a stabilizing layer forming a plurality of compartments for receiving a granular infill; a separation layer for location over the stabilizing layer to retain the infill; a water distributing layer; and an artificial turf layer. The claimed construction allows a stable base layer to be formed using virtually any locally available granular material such as earth, gravel, lava, rock and the like. The compartments ensure that the granular material is held in place and cannot be displaced due to loading or washed away due to rain or flooding.