I pack my kids lunches in a three compartment ziplock plastic container with a lid. I have been doing a little theme to their lunches. I label each compartment by writting on the lid of the ziplock containers with a wipe off marker. So today I sent my daughter to school with Rapunzel's hair (angel hair pasta) The forest trees from Brave (broccoli) and Dalmation's cake (lemon poppyseed cake, spots!) I also write on the lid how many days we have until our trip! 33 as of today! EEeeek.
I don't plan out a theme for the whole meal, but just try to come up with a name for what I already plan to put in her lunch. That way I am not going out of the way planning, but pack what I would anyway depending on leftovers, then just have a fun name for it.
Last week I did make a sword for each kid out of a toothpick by adding a blue paper handle, then I stuck them into pork chops I had cut into cubes. Sword and the Stone dinner, followed by the movie of course.