Seth just started this last night! He crawled into the family room, stood up, and decided to start walking! He turned 21 months on the 15th of March. But subtract 3 1/2 months for prematurity, and he's not that far behind in walking! Kate and Dane were 15-16 months old when they walked, so adjusted, Seth is 17 1/2 months. Not bad for being such a preemie!