M.V.
I've experienced both ends of the spectrum with this question! My daughter napped every day until she was 4. When she was 4, her brother was born, so I guess the change in the household got her out of her routine. But boy was it great to be 8 and 9 months pregnant and have her still napping :) My son, on the other hand, gave up his naps altogether (NO MORE NAPS) at one and a half. He was never a great (as in long, uninterrupted sleep) sleeper - he just never seemed to require as much as the rest of us. To this day, my daughter (age 19) loves her sleep, and sometimes takes afternoon naps in college - LOL. And my son is still both a night owl AND an early riser!