3 kids 2 years-6 months between 1 & 2, 2 years-2 months between 2 & 3.
it's not a bad spacing, far enough apart that they have their own friends. close enough together that they don't mind doing things together (so they don't feel like they are babysitting when the little sister comes along, occasionally.
plus school spacing is 2 years, so the older ones still remembers most of the work and can help the younger understand. another added benefit is that my oldest loves to teach things to his sisters and had both girls reading at or above 1st grade level before they started first grade (the youngest before she was in kindergarten), he also had the youngest doing multiplication before she was through with 1st grade.
