Is anyone elses baby going through sleep regression. My twins are almost 11 months old. It usually affects my son at night. But all this week and has affected my daughter and she used to be a great Napper and now she won't take a nap in her crib. She's hard to get to sleep on me. I have been having to take stroller walks for car rides once my son wakes up to get her to sleep. They both are very active of babies. Not walking yet but she has started to use a walker. They crawl all over the house and between the two of them it is a crazy day.