This is probably an older thread but just wanted to add my .02 cents. My oldest DD didnt take a nap longer than 20 minutes until 5 months. Now at 3 years old she is definetly a 'highly spirited' child but she is also very bright and ahead of most 3 year olds in language and understanding and is also very athletic and all muscle. She continued to not really ever wnted to take a nap and the last 2 winters when we are outside less she would temporarily give up naps until Spring again. Luckily around 9 months old I gave up trying to do any sort of nap scheduling or routine tryingbecause it just is not her style.