Sound sensitive clock: Sound sensitive clock is Montessori's music teaching aid, which is mainly aimed at rhythm and prosody training in auditory training. This acoustic clock consists of two groups of metal Jason Chung with different sizes. The first group is called the operation group, and 13 can knock out the Jason Chung from the center C, all the whole tones and semitones in an octave; The second group is called the control group. The base has two colors: black and white. White represents all the whole tones in an octave from the center C, and black represents all the semitones in the octave.

When training, let the baby hit the notes with a mallet. Listen to the notes first, then rely on the Jason Chung of the second group to pair up and return to the original order.