I've seen an alarm clock that wakes you up naturally, so you don't feel groggy.
It has a ball on top which is like a big light bulb. Say you set the alarm for 7:00am, the bulb will gradually getting brighter and brighter before the time you set the alarm, to bring you round at the right time.
Its supposed to trick your body into thinking it is dawn and it wakes you up gradually, instead of being shocked awake by a loud noise.
