Oh--and yes, activities like soccer (recreational, not super competitive) are great. That kind of thing creates a framework where the kids all care about the same thing, at least temporarily--and the team-building skills, especially for kids who are used to one-on-one conversations with adults, is terrific for "rounding out" in general. I have always been surprised at how much our son loves soccer. Of course, there have been many times (also getting much better with age) where he's on the field and clearly thinking about base 2 numbers or the elliptical orbit of Pluto. But it's been very cool to see him so engaged in the game, so into the team--and to watch the amazing improvements in all aspects of his skills (related to focus on the game as well as manipulating the ball, noticing where his teammates are on the field, etc.).