Apparatus that interconnects the twenty-one pieces used to play the ancient backyard target-throwing game "kubb", pronounced "coob", into a portable self-contained carrying case that looks like a briefcase. An improvement over transporting kubb in heavy crates, boxes, or bags. To assemble: five throwing dowels fit horizontally through five evenly spaced holes drilled through a large vertically standing block with carved crown top called the "king". Each exposed dowel-half jetting right and left from each king hole receives a smaller block or "kubb", each containing a matching drilled hole. Ten kubbs completely cover dowel halves and slide up snug against king. Cord attached to the king and looped at both ends receives a sixth dowel, creating a handle. Four playing-field boundary pegs drop into matching king-top vertical holes. Apparatus constructed from waterproof, virtually indestructible plastic lumber that comes in any color and won't splinter or chip like traditional wood kubb sets.