we brought our first son to wdw when he was 8 months old and brought him back when he was 12 months. we brought the second son to wdw when he was 4 months. our experience was that it was very easy to have the young ones in the parks. bring your own stroller, make sure you have adequate provisions, etc and you'll be fine. the world is very baby friendly. i would not hesitate to take an infant to wdw, as long as you are prepared for it.