THOMASTON — Join Professor Harold Hill, Marian the Librarian and a cast of 36 as they weave their way into your hearts during an evening of musical fun for all ages in the spirited new production of Meredith Willson’s “The Music Man” at 8 p.m. July 18-20, at Watts Hall. The production is directed by David Mills, with JoAnne Parker wielding the baton. General admission is $6 and $5 for children and seniors. For further information, call 354-8000.