For the past couple of years I've been following Joe Baldwin's dream of installing a flatbed garden on a CTA train that would traverse the city for a month. His idea is rather simple. Build a raised bed that's attached to a Chicago Transit Authority train and plant it with native plants and let the train carry the garden throughout various Chicago neighborhoods. You'd think such an idea would be either really easy to implement or impossible to given the bureaucracy of a big government agency. The truth is that his dream is almost on track and the only thing holding him back is money. The CTA and the USDA have given the idea their blessing, all he needs is a big corporate sponsor to underwrite it. But for five hours in August of 2010 he gave Chicago a glimpse of what a mobile garden would look like during Art on Track.