I think I am with Calochortus on this one. It is a neighborhood business that has a an urban garden which they probably only run a few months a year anyhow. It sounds like they already employ a gardener which is really all you need for a lot that size. I think more than anything they were thinking “hey, wouldn’t it be nice if we could teach some of the neighborhood kids how to tend a garden”
Plus they are throwing in free pizza. I don’t know, stop by for a couple hours after school, learn how to garden and get free food doesn’t exactly sound like slavery to me. It isn’t exactly busting your hump 10 hours a day out in the field picking fruit.