I will allow a morning nap as long as it doesn't begin to interfere with afternoon nap. I currently have an almost 19 month old that still goes down for a quick sleep in the morning. I put him down after snack at 9:30, and limit it to an hour or less. Afternoon nap is immediately after lunch, which is between 12 and 12:30. Wipe up, diaper change, and typically all the small ones are in bed and asleep by about 1. Whatever time I put them down, quiet time lasts for 2 hours from that point. A couple of them struggled with it at first, but now when I am wiping thier hands and faces they are asking for "seeps" and waving night-night to the other kids!