Just wondering how much A time your toddlers need/needed at 18 months? Mine is nearly 19 months and was doing well with 5-5.5 hrs but recently doesn't seem that tired after 5 and a half. A couple of times I put her down for nap after this much A time and she spent another 30mins playing in cot before sleeping which is unusal for her. She has 2hr naps and usually 11-12 hr nights.
Thanks!