Great thread, great question and great responses. My wife and I are also expecting our first child this year and I'm already looking forward to sharing my experiences with my future boy or girl. While I sometimes dream of a "coast to coast" tour, in reality, my wife's work schedule as well as mine will not permit that, so a standard 2 week tour should suffice, especially for a young child. I was thinking the same thing; and that is to start touring with our baby when he she is around 3 years old. At that age you can get a little feedback and be able to interact a bit better when it comes to activities. Anything under that is a bit young for bike touring. Sure a few hours to the city park is okay, but not a 500 km ride through Loire Valley or along the Danube to Vienna...