OMG! That would make me crazy, not being able to plan anything at all. I have 2 three year olds, a 1 1/2 year old and 2 who have just turned one. None of them nap in the morning but I asked the parents to help out with that before starting here. We have lunch at 11 and I nudged naptime to 12 or shortly after. They all nap until about 2:30-3 now. As the age groups change the naptime hours change a bit, but if you nudge it slowly, maybe 10 minutes a week you can get the children adjusted.