I think I’m beginning to understand why Simon enjoys music theory so much. It was long past what is supposed to be bedtime as he went on noting the “Happy Birthday” tune, meticulous about the correct number of beats between the bar lines: 4/4 or 16/16. Look, “Mom”, he said, “This one is a dotted note and it’s 3/8 long! I can explain it with a formula: n + 1/2 of n, where n is a note. This one is 1/4 beats long plus one half of 1/4 and that is 1/8. That is the same as 2/8 plus 1/8!”, he jumps in excitement. The rests also had to correspond to the measures.