I have a 16 month old (my ds), an 18 month old, a 22 month old, 2 3yo, a 4 yo and my dd is 4. In the summer before two dck started ( 3 and 4 yo) I had 2 others who were under 18 months. That was a busy time! However, they were all on the same schedule and with the the nice weather we had a good time...I actually prefer the little ones and once my two older dck are in school in september i wont be taking any more over 3.