Check out this neat learning science barge that is currently tooling around the island of Manhattan, growing food. The Science Barge was built by the New York Sun Works non-profit, and, according to their website, the barge
…is a sustainable urban farm powered by solar, wind, and biofuels, and irrigated by rainwater and purified river water. We grow food in the city with no carbon emissions, no water use, and no waste stream.
School kids from all five boroughs and the general public can visit and learn about solar power and urban gardens and farms.