What better way to start the day than waking up in your own good time and lying cosily in bed until you are ready to get up? Isn't that why we all look forward to Sundays?
That's why babies prefer to sleep in a bed that they can access themselves like a Dream Coracle. They can crawl in when they feel like snuggling down, and wake as gradually as they want!
P.S. Watch this video to see how one nursery allows babies to choose when to sleep.