If those are your most important... I would go straight to Fantasy land and probably get Pooh (closest to Tomorrowland) and then head over to Buzz. The line there usually isn't too bad in the early a.m. Then make your way toward Fantasyland and get Peter Pan before riding Pooh. There are a couple of play areas and several rides to pass the time in between fast passes, also lots of kid friendly rides. Try Small World, Philharmagic (3D show but the little ones really seem to love it), and if you have a LOT of time to kill, you could always wait in line for Dumbo (no FP on this one). After you've finished with Pan and that area, head through Frontierland (maybe catch a fun Toy Story street show on the way) and into Adventureland. You might think she's still a bit young, but my nieces 4 & 1 LOVE Pirates of the Caribbean and sing the Yo Ho song with them. Once you're on that side of the park, grab a FP for Jungle Cruise if there is a line (you never know, sometimes it's a 5 min wait in the middle of the day!). If you do decide to FP it and didn't want to wait for Dumbo, ride the Magic Carpets. Also the Tiki Room is a great respite if you need a little air conditioning or resting of legs.
If you get to MK early in the morning, you can probably do all this by lunch time or afternoon naps. We usually take off to the hotel around this time and then come back after dinner and again it's a little less crowded than mid-day.
Jan '07 Pop Century, Mar '07 Day Trip, April '07 Off Property, May '07 OKW, July '07 POR, Oct '07 Pop Century (& MNSSHP!!!), Dec '07 Day Trip
Jan '08 POR
Feb '08 Pop
Mar '08 Off Property
April '08 AS Sports - I think - still gotta book it