Abstract: A biomedical device and method provide for decullularization, recellularization or other treatment of an organ of a human or animal. To keep pressures to a minimum and to ensure that the perfusion fluid uniformly perfused the organ, the organ is supported and rotated during the perfusion process. The organ is supported by a medium, which may comprise a liquid or pallets in a vessel, with a vessel mounted for limited rotation. The perfusion tubing, for supply of perfusion fluid to inform the organ can be mounted both to a support structure and the vessel. The perfusion system can include tubing for supply of air or an air substitute.

Abstract: A set of blocks, for playing a game comprises a plurality of blocks, each block having one characteristic selected from the first category and one characteristic selected from the second category. At least some of the characteristics in the first category are different from one another and at least some of the characteristics in the second category are different from one another. Categories can include a degree of abstraction and may include shape, size, colour, texture, weight and surface finish. The blocks can be provided with a game board and a die, for playing a game or for diagnosis. The blocks can be used for play, and for diagnosis of children with autism or other individuals with other neurological disorders.