You can review some of the pre-made Touring Plans here - https://touringplans.com/magic-kingdom/touring-plans
and find one that might fit your family. Or, as mentioned above, you can create your own just by selecting all the rides, shows, parades that you might wish to see and the Touring Plan will help to put them in order for you.
One thing I would consider - divide the park in sections and try to do everything in that area rather than zig-zagging around. You can adjust the Touring Plan to minimize walking, and I would definitely do this on your half-day for sure. Try to think about whether your family might have a favorite attraction or two and plan to ride them on both days. Since the 26th is a MVMCP day, you won't see the castle Happily Ever After show that night (they will do Holiday Wishes for MVMCP guests instead), so definitely consider making sure you see HEA on the 29th date if it's important to you.