Leader development has traditionally focused on adults. However, evidence suggests that these efforts are limited to developing and refining skills, encouraging some reflection, and helping the learners plan for the future. The underlying problem is that these are people whose brains are fully developed and relatively set. Hence, adult leader development works with what is already there. In this controversial essay, we argue that leader development activities should instead be directed towards children. Their brains are forming and leader development work will create and shape the leaders of tomorrow. We draw the important caveat that relatively little is known about influencing leadership in young brains making this a fertile and exciting, if challenging, area for leader development research.