Did you grow up with a garden? My Dad's garden took up half of our backyard. I remember being amazed when rogue tomato plants would pop up somewhere my dad didn't plan them, or when corn sprouted out of the compost pile (I refused to eat that corn, by the way). So when my roommates and I heard that my friend Kristin's kids were itching to do some gardening, we got some seeds and invited them over.
It was so fun having kids over, and to see how excited they were to dig and plant. And thankfully, it was warm enough to splash around a bit afterward to get clean.