Below is a mock-up of one of the boxes. Only the sides are assembled, the 2x6's ,2 at the top and 1 at the bottom, are not attached yet. The one at the bottom of the pic will actually be attached at the top of the sides. This is the high side that will be next to the garage. The bottom 2x6's on each side on this end may be trimmed to fit the landscape more or else go underground. That will be determined in the backyard.
That's as far as I went today. Tomorrow morning I need to run back to the lumberyard for some studs to use as bracing, more screws, and 1-10' treated 2x6 that I somehow shorted myself on my lumber list. If you look to the left you'll see the new wheelbarrow, still unassembled, that will help us fill the boxes with dirt.
It's finally starting to take shape!