Mickey's Magical Milestones Tour gives you a comprehensive overview of the Magic Kingdom; not only will you learn the secrets and history of the mouse, but you'll learn the whole timeline of Mickey through the ages. This tour is just $25 per person (15% discount for
DVC 
), and 2 hours in length; it starts bright and early at 9 a.m, leaving you plenty of time to explore other areas of the park afterwards.
You end up in Toontown and welcomed by the "Mouse" himself and taken into his home (time to smirk at those giving you the "evil eyes" waiting for the official opening at 10:00am

). Then onto Minnie's house. Lots of photo opportunities.
By the way, I'm not going to tell you how to book this as not many people know about it and I'm keeping it all to myself.....
Oh! Alright then!:
http://disneyworld.disney.go.com/wdw/parks/tourDetail?id=DisneysMickeysMagicalMilestonesTourPage