Abstract: A horizontal plate microbial support media. The horizontal plate microbial support media having a plurality of frustum shaped protuberances extending there-from, the frustum shapes having a hole in their upper base for allowing fluid to flow there-through. These media plates able to be stacked for use in a bioreactor.

Abstract: A horizontal plate microbial support media. The horizontal plate microbial support media having a plurality of frustum shaped protuberances extending there-from, the frustum shapes having a hole in their upper base for allowing fluid to flow there-through. These media plates able to be stacked for use in a bioreactor.

Abstract: A racing game formed of a plurality of equal length tracks. A movable member is positioned on each of the tracks and contains a pair of track engaging members positioned thereon. A pair of drives are movable along each of the tracks for advancing the position of the movable members along the tracks. Each of the drives move at different speeds and are each formed of endless belts. The drives are mounted so that they continuously move from one side of one track to one side of the adjacent track. The drive is formed of a continuous length belt having randomly spaced teeth thereon. As the belt moves the teeth cause the movable members to move along the track. The track engaging members may be formed with different spacings for different movable members, thus increasing the probability that the interval of time that each movable member completes movement along the entire distance of the track differs for each member.