FWIW, here's some thoughts from me as a CSA consumer:
1) I had a CSA in WA where we came out to the farm and harvested each week (some was picked ahead for us, some we picked). That was awesome to do with my DD (for a city kid, petting a cow or picking a raspberry off the bush was a big event). Maybe even just hosting some berry picking, or something?
2) That CSA had a flower patch. It was so nice to get fresh flowers every week!
3) As a small farm, I think it helps to have something that makes you stand out. My current CSA (near Eugene now), grows a lot of fruit - raspberries, blackberries, apples, grapes... So my box gets lots of fruit, less greens than most CSAs. When you're feeding two kids under 5, that is a very nice thing. Heirloom stuff would be another "cool" way to make your CSA offering a little different, since you can't really compete with the size and variety of a bigger farm.
4) Recipes. I get stuff in my CSA boxes that I don't even know what it is. Quick instructions on a yummy way to cook things (or an email newsletter), very helpful for those of us who don't know what to do with sorrel or kohlrabi or the funny yellow squashy cucumbery thing in our box
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Maybe find a few people in your community interested in supporting a "starter" CSA? e.g. you'll get 5-6 boxes this summer, and more next year as the farm expands? I'd love to do that here, and get a voice in what gets grown, etc...
Good luck - I think CSAs rock
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<edit> Oh, and starts - one of my CSAs gave us a couple of tomato and bean starts each year - yummy snacks, and really fun for my DD to plant and watch grow, it gave her more attachment to the CSA box of food...