Article in English: Choose round bottles with flat bases and wide mouths. You can also do this with jars. Number them 1 through 5. Add the following amounts to the water bottles:  Bottle 1: 19 oz. This will produce an F note. Bottle 2: 13 oz. This will produce a G note. Bottle 3: 11 oz. This will produce an A note. Bottle 4: 8 oz. This will produce a C note. Bottle 5: 6 oz. This will produce a D note. Tap the spoon against the sides of the bottles to produce notes.

Summary in Indonesian:
Dapatkan lima buah botol air berukuran sekitar 0,6 liter. Isi botol-botol tersebut dengan jumlah air yang berbeda. Mainkan botol-botol tersebut dengan sebuah sendok logam.