You know your way around the Greenmarket, or at least you'd like to. Well, here's your chance to volunteer to lead tours and help the thousands of kids who come through the markets learn about eating fresh, local, healthy food. The tours, of Manhattan and Brooklyn Greenmarkets, are one hour and occur all year, but mostly during October, prime harvest time. The one-hour training sessions are offered at 10am and 4pm at the Grand Army Plaza, Brooklyn Greenmarket on July 13 (this Thursday) and September 14 and at the Union Square, Manhattan Greenmarket on September 13. Guides will lead one to three tours during a given day between 9:00 am and 12:30 pm. Visit Spoonsacrossamerica.org to learn more and to obtain a copy of the registration form, or call Carlota at 718.279.0331 for more information.