Scarecrows, Pumpkins, and Candy...Oh My! Celebrate the fall season with games, candy, arts and crafts, and a haunted mill tour at Eden Mill Nature Center, 1617 Eden Mill Road, Pylesville, 2-5 p.m. Members- $1, Non-members- $3. Register at 410-836-3050; http://www.edenmill.org.
Great Halloween Lantern Parade: Watch or join in a parade of paper lanterns, costumes, and great floats all leading to a Jabberwocky Jam featuring live bands, hot drinks, and food. Parade participants line up at the Pulaski Monument, Linwood and Eastern Avenues, Baltimore. Line up at 7 p.m.; parade at 7:30 p.m. Free. Contact the Creative Alliance at the Patterson, 410-276-1651, http://www.creativealliance.org.
What is an Opera? Listen to and learn about the fundamentals of the opera at the Reginald F. Lewis Museum of Maryland African American History and Culture, 830 E. Pratt St., Baltimore, 1-3 p.m. Saturday and Sunday. Ages 7 and under. Free, Register at 443-263-1831 or AfricanAmericanCulture.org.
How Big is Big, How Far is Far and How Small We Really Are!: Explore the universe with an interactive lesson at 2 p.m. at the Carroll County Public Library, Eldersburg branch. Ages 6+. Free. 410-386-4488, http://www.library.carr.org.
Halloween Spooktacular: Borders in Timonium, 170 W. Ridgely Road, will have a costume contest, storytime and more from 2 p.m.-4 p.m. Free.
Sunday, Oct. 26:
Halloween concert: Peabody Preparatory's Young People's String Program presents a concert of 14 short works, including Niccolo Paganini's Witches' Dance, performed in costume at 2 p.m. at Peabody's Miriam I. Freiberg Concert Hall, 17 E. Mount Vernon Pl. Free.
Animal Appreciation Day and Pet Parade: Play dress up and other fun games with pets, 1 p.m.-4 p.m. at Hancock’s Resolution, 2795 Bayside Beach Rd., Pasadena. Pets and people of all ages, 410-255-4048.
On the Cutting Edge: A workshop-style lesson in fine paper-cutting with Zipora Ne’eman at the Jewish Museum of Maryland, 15 Lloyd St., Baltimore. Four classes: 10 and 11:30 a.m., or 1 and 2:30 p.m. Register and get more information at 410-732-6400 or at http://www.jewishmuseummd.org. $10 members, $15 nonmembers includes admission.
Leafy Monsters: Create creepy monsters made from leaves at Fort Smallwood Park, 9500 Ft. Smallwood Road, Pasadena, 11 a.m.- 12 p.m. Free. Ages 5-10. Advance registration required: 410-222-0087.