Boom Boom the Bass Drum is a series of music books for early learners. Music and Math teaches elementary math. Whole Note equals 4 beats, Half Note Equals 2 Beats. (4) beats plus (2) beats = 6 beats.Boom Boom the Bass Drum is a series of music / story / coloring books that teaches music to kids, early learners. These are very easy, but great educational activities. I'm Michael Welch, author/musician and creator of the Boom Boom series. Thanks for...