My DS still has a few little sleeps brought it the day (20-45 mins) rather than one longer nap. Any advice as to how to switch this to longer sleeps? He always falls asleep in the car and when in the pram for a walk. He sleeps in his pram for a nap but generally wakes after around 40 mins. I think it would be better for him and for us to be in a better routine for sleeping during the day!