All good suggestions
When I was 24-25, (early 70's) I worked in a Pool room while going to college, and I used to teach kids how to play. I usually had 4-6 kids taking classes. They usually ranged from 7 to 11.
My 2 'prize' students were as different as night and day. The oldest, 11, had straight shoulder length hair, and the other one, 10, a half head shorter, had dark curly hair, and they were very competitive with each other. I would every so often hold little tournaments between the students. These 2 would always be in the finals. My 11 year old did and was capable of running a 3 pack on a 9' table. The 10 year old did run a 2 pack. They were playing 9 ball. I was very proud of all my students, but especially those 2, and have often wondered how good they became later on.