"Most elite athletes have a history of playing many different sports, and there's a reason for that," explains Gould. "Each teaches something different: Soccer gives you foot skills; baseball teaches you eye-hand coordination. If my daughter plays softball and learns how to throw, for instance, she'll have a better serve in tennis."- this was taken from the above article.
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This was a great point, about advantages of not specializing in one particular sport, too early.
Many good points were addressed in this article about the little ones. I think there is a fine line between too much and too little. Just not always sure where.