Are you imagining artificial augmentation somehow? Purely through tutors or training programs we seem pretty limited. Otherwise billionaires (or even multimillionaires) could have far more consistently successful kids.

Don't the children of the wealthy famously have a tendency to be successful? Or have I badly misinterpreted the last several thousand years of human history.

To really drill down into that I would think you would need to figure out how many millionair children get tutored vs how many get spoiled.