I have 2 18 month olds who will be 2 in the fall, but one is leaving I just found out. Then I have two just turned 2 year olds who will be 2 1/2 and then my daughter will soon be 3 and her 3 year old friend is leaving for school. I had them in nice age pairs...so I am trying to decide whether to take another baby to match with the other new baby or take a 2 year old (I have a family interested) who will match with the other little boy who is going to be 2 (they are exactly the same age) or hold out for a 3 year old...which may or may not materialize! I think my concern with the 2 year old is that then I will have 4 two year olds...which means if they all stay they will all leave for school at the same time. Plus, the 2 year old has been home with mom until then...so I'm a bit concerned that he will have a hard time adjusting. I really love the 3 year olds...you can do so much with them...but it's true, eventually my current 2 year olds will be 3...if they don't go off on mat leave with their moms...sigh.