If info is out, check the calendar to see if there are any early closings or special events that would effect your trip. Barring that, and considering that it is a first trip, and the first day is a half-day, I'd do something like this:
| morning | afternoon | evening |
| Day 1 - | travel | AK | AK |
| Day 2 - | MK | MK | MK |
| Day 3 - | resort break | HS | HS |
| Day 4 - | Epcot | Epcot | Epcot |
| Day 5 - | AK | resort break | DS? |
| Day 6 - | MK | MK | MK |
| Day 7 - | return to HS | or Epcot | (or split up) |
Trade around as needed to account for extra magic hours, etc. - or to put a mid-day break with the closest park to your resort. The point is to have them! - in whatever way fits your family best (sleep-in mornings, mid-day breaks, early-end days...) The point is
not to go three full "rope-drop to fireworks" days in a row. (We call that the "day 3 curse" - and it's not pretty!)
And do be scared off by that "split up" thing on day 7 - you very well might find that the kids love different parks. While
some "all together" time is important on vacation, it really is OK to split up for a little while! (
Or to have one parent take the tired child(ren) back early and the others stay late on any day. - It's better to cut a day short than to ruin the next day!)
And my advice to all first-timers: For each park day, have each member of the party pick their #1 "must-do" and a couple of "like to"s, and prioritize accordingly. There is
never time to do everything WDW has to offer, so do the most important things, and the rest is gravy!