MDF (Medium-Density Fiberboard) is engineered wood that is made of broken down wood fibers mixed with wax and resins and then heat pressed into dense, durable sheets. The main tree species used for MDF is plantation-grown radiata pine, which is generally known to have wide rings and is knot-free. This interactive piece mimics those wide rings and how a tree grows taller within the stacking elements. The image that is lasered on the elements is an abstract form of the bark on a plantation-grown radiata pine and is done in a way to show as if the bark is the particles making up the MDF board.