Monster Musical Chairs By (author): "Scott Nash, Stuart J. Murphy"Genres:Childrens books Picture Books Mathematics books Music books Counting books Subtraction books ISBN0060280212ISBN139780060280215AsinMonster Musical ChairsOriginal titleMonster Musical Chairs (MathStart Level 1)SeriesMathStart Level 1Monster Musical ChairsEvery time the music stops, one more monster is OUT! Kids won't be able to sit still for this musical introduction to subtraction at its simplest.