This paper reports the result and analysis for the internet survey of fathers having younger kids. Through the survey, we find the importance of social avocation. Sharing the avocational activities with others tends to make fathers' social networks supporting their child-rearing more diversified on the gender aspect. And diversified networks encourage fathers to participate on mothers' child-rearing activites. Communication media play an important role in the avocational acitivites and diversitfied networks.
