Nap time

Noah generally still naps on weekends-I wish I could get him to sleep longer in the morning so he didn't need a nap in the middle of the day but he is an early riser who tends to get a little cranky in the afternoon.  Natalie on the other hand rarely naps but there are times when she falls asleep.  The Saturday after we went to the Botanic Gardens was one of those days.  I wasn't sure she would fall asleep but she did and this is how I found her.  How on earth does someone fall asleep like this and how is it comfortable?