26-Oct. For kids, "Code Name 4-5-6," activities for children in grades 4-6. This month's topic is "Hail to the Chief." 2:30-3:30 p.m., Calvert Library Prince Frederick branch, 850 Costley Way. "Doctor Who" 50th anniversary program, 6 p.m., Lexington Park Library, 21677 FDR Blvd., Lexington Park. 301-863-8188 or www.stmalib.org. Home-schoolers workshop, for students and parents, information about library resources and services. 2 p.m., Leonardtown Library, 23250 Hollywood Rd., Leonardtown. 301-475-2846 or www.stmalib.org. 4-8 p.m., Solomons Island Riverwalk, Solomons Island Road. St. Mary's seniors forum, discussion of issues concerning seniors, hosted by St. Mary's County Board of County Commissioners and the St. Mary's Department of Aging and Human Services. 10 a.m., Southern Maryland Higher Education Center, 44219 Airport Rd., California. Jellyfish program, for preschoolers and elementary school students, learn about jellyfish in the Chesapeake Ba and make a craft. 2-2:30 p.m., Bayside History Museum, 4025 Fourth St., North Beach. 410-610-5970, www.baysidehistorymuseum.org or baysidehistorymuseum@hotmail.com. 6-9 p.m., North Beach Boardwalk, Bay Avenue and Fifth Street. Dodgeball registration deadline, for participation in the 2013 Columbus Classic Dodgeball Tournament, 9 a.m.-4 p.m. Oct. 12. Adult and high school divisions. Round robin play. Minors must have parental permission, Leonard Hall Recreation Center, 23145 Leonard Hall Dr., Leonardtown. $150 a team, includes six-10 players. 1803, www.stmarysmd.com/recreate/dodgeball or kyle.kebaugh@stmarysmd.com. Barstow farmers market, fruit, vegetables, bedding plants, local seafood, baked goods and cut flowers. 7:30 a.m.-noon, Calvert County Fairgrounds, 140 Calvert Fair Dr., Barstow. Asbury-Solomons sale, housewares, furniture and miscellaneous items. The library committee will be selling used books. Proceeds will benefit the Benevolent Care Fund. 9 a.m.-3 p.m., Asbury-Solomons Island, 11100 Asbury Cir.