Each week, there are hundreds of free or low-cost events for families and kids in Washington, D.C., Maryland and Virginia. We've done the hard work for you, sifting through our extensive kids' event calendar to let you know which events are sure to please. Have fun, make memories and go on an adventure with your family!

Sept. 26. Jammin' Juniors. 12:30 p.m. Pack a picnic and head to the gazebo for a free lunchtime concert. Today's performance: Vanessa Trien and the Jumping Monkeys. Ages 2 to 5. FREE. McLean Central Park Gazebo, McLean, VA. aldentheatre.org

Sept. 27. Family Geocaching Adventure. 4:30 p.m. Learn how to use a GPS unit, and spend the day on a geocaching adventure in search of local caches. We'll roast marshmallows around the campfire at the end of our September adventure! Ages 8+. Preregister. $$ Meadowside Nature Center, Rockville, MD. parkpass.org

Sept. 27. Sukkah Decorating Party. 5 to 7 p.m. Help decorate the J's sukkah by making crafts and hanging them for all to enjoy. RSVP: 202-777-3271. FREE. DCJCC, Washington, DC. washingtondcjcc.org/kids-and-parents/

Sept. 28. Mista Cookie Jar & The Chocolate Chips. 10:15 and 11:30 a.m. LA-based kindie rocker Mista Cookie Jar gets the Tot Rock season off to a sweet start with urban-island-folky-rock-and-roll sounds. Ages 2 to 6. Preregister. $$ S. Dillon Ripley Center, Washington, DC. si.edu/events

Sept. 29. 3rd Annual Funville. 10 a.m. to 4 p.m. Join Washington Parent for a day of exploration, education and entertainment at this free community parenting fair. Kids will enjoy live entertainment, a mascot parade, giveaways and activities. FREE. Dulles Town Center, Dulles, VA. washingtonparent.com/funville/index.php

Sept. 29-30. Fall for Fairfax. 10 a.m. to 7 p.m. The Fall for Fairfax Kidsfest returns, and it's bigger than ever! Enjoy pumpkin painting, hayrides, a petting zoo, inflatables and live entertainment. Be sure to stop by the Washington Parent booth! FREE. Fairfax County Government Center, Fairfax, VA. fallforfairfax.com

Sept. 29-30. Kaleidoscope for Kids Art Festival. 10 a.m. to 4 p.m. This festival offers plenty to see, hear and do for children and families, including a kaleidoscope-making workshop, origami workshop, puppet parade, art car painting, strolling artists and food trucks. $$ Durant Center for the Arts, Alexandria, VA. artskaleidoscope.org

Sept. 29. Opera in the Outfield. 7 p.m. Washington National Opera and the Nationals Baseball Club host a free live Opera simulcast to more than 20,000 patrons. Family activities include pre-opera activities, prizes, live performances and the simulcast. FREE. Nationals Stadium, Washington, DC. kennedy-center.org/wno/

Sept. 30. Full Moon Club: Harvest Moon. 7 p.m. Experience nature at night with a hike through the meadows and woods. Look for signs of animals, then end the hike with marshmallows around a campfire. Ages 6+. Preregister. $$ Brookside Nature Center, Wheaton, MD. parkpass.org

Oct. 2. Book of the Month: Rapido's Next Step. 10:30 and 11:30 a.m. Head to the Building Zone to explore the city with Rapido through an interactive book. Ages 3 to 5. $$ National Building Museum, Washington, DC. nbm.org