A stacking or stackable unit or apparatus is disclosed along with an associated method for use of the unit(s) as, for example, a game and/or toy that includes two or more vertical stacked units. Each unit may include a top or upper surface, a sidewall extending from the upper surface, and a bottom or base. The upper surface may also be angled relative to the base and may be designed so that the upper surface of one unit may be mated/interconnected to the base of another unit.