I was a musical dunce.
At age 5 or 6 mother tossed me to the neighbor to learn the piano. Ethel tried, she then had a stroke. I learned mostly nothing.
Age 9 there was an after school program, I was sent to learn violin. Very painful! How do violin players hold those things under their chin? I almost learned Twinkle Twinkle Little Star. The following year I was sent back and tried again. Different teacher, learned how to waste time.
Age 12, I was put in band class and handed a clarinet. I found chewing on the reeds for the mouthpiece quite enjoyable...didn't learn to play the instrument though. Kicked out sent to Chorus, where I was an excellent lip-syncher.
All the above said, if a child wants to learn, I figure let them have a go at it.