October 20 through 23 Disney On Ice presents Follow Your Heart. All ages (family-friendly event). 12:30 and 4:30 p.m. Make unforgettable memories with Mickey, Minnie and all your Disney friends when Disney On Ice presents Follow Your Heart skates into your hometown! Tickets online. $$ EagleBank Arena, Fairfax, VA.

National Trademark Expo: What's That?. All ages (family-friendly event). 10 a.m. to 4 p.m. This expo serves to educate the public on the importance of trademarks in our nation's economy. This year it will feature educational programs targeted to kids of all ages, as well as adults. The Expo will also feature children's activities and characters such as the Fruit of the Loom costumes and Trademark's own Trademarky costume. FREE Andrew W. Mellon Auditorium, Washington, DC.

October 21, 22 and 2Boo at the Zoo. Ages 2 to 12. 5:30 to 8:30 p.m. Kids can stop by more than 40 treat stations, animal demonstrations, keeper chats and decorated trails. This frightfully-fun evening is a magical time for the whole family! $$ National Zoo, Washington, DC.

October 22 Earth Celebration and ReUse It Sale. All ages (family-friendly event). 8 a.m. to 11 a.m. The Audubon Nature Preschool brings the gift of wonder to children! Come visit for family nature walks, gently used children's items for sale, naturally delicious homemade treats, your morning cup of coffee and connections with Nature Preschool staff and families. FREE Woodend Nature Sanctuary, Chevy Chase, MD.

October 22 7th Annual "Monster Mash". All ages (family-friendly event). 3 to 7 p.m. The spooktacular event will feature live music by Liquid A on the main stage, fall craft activities, a stilt-walking Frankenstein, glitter tattoos, beer garden and festival food. Food Network's Season 6 Halloween Wars team will be demonstrating extreme pumpkin carving, pastry design and candy sculpting. Frightfully fun parade at 4PM and costume contests for children and leashed pets. FREE Village at Leesburg, Leesburg, VA.

October 22 Fall Festival. Kids ages 2 to 5. 10 a.m. to 1 p.m Play pumpkin bowling and other carnival games; enjoy moon bounces, live music from Bones Jones Music, face painting and a demonstration from Master Method Karate, and a kids' fun run $$ Early Childhood Center's, Rockville, MD.

October 22 Festival and Games Day. All ages (family-friendly event). Noon to 4 p.m. Star Gazing Farm Animal Sanctuary is holding a Festival and Games Day! costume contest (adults welcome to wear costumes, too), traditional farm games like horse shoes, seed spitting contest, pony hop, tug of war, pumpkin tic-tac-toe and more. Hot cider, hot chocolate, bake sale, meet and greet the animals and enjoy good cheer. FREE Star Gazing Farm, Boyds, MD.

October 22 Game On, Greater Washington. All ages (family-friendly event). 9 a,m, to 5 p.m. Brought to you by the American Diabetes Association National Capital Area Chapter and proudly supported by the Redskins, is a one-of-a-kind festival featuring activities from rappelling and zip lining, to biking and fun runs, and everything in between. Kids' Zone, rock climbing wall, zipline and extreme obstacle course plus Health & Wellness Expo, live music with great bands. $$ FedEx Field, Landover, MD.

October 22 and 23 Fall Harvest Family Days at Mount Vernon. All ages (family-friendly event). 9 a.m. to 5 p.m. Celebrate autumn at Mount Vernon with wagon rides, straw bales mazes, apple roasting and more! Tickets online. $$ Mount Vernon, VA.

October 23 Sukkot Storytime. All ages (family-friendly event). 10:30 a.m. to noon. You are invited to storytime in the sukkah. In addition to stories, enjoy arts and crafts, snacks, and songs! Co-sponsored with PJ Library. Preregister online. FREE Edlavitch DCJCC, Washington, DC.

October 24 through 28 Fall Festival on Woodrow Wilson Plaza. All ages (family-friendly event). 11 a.m. to 1 p.m. Enjoy hot cider, face painting, a hay bale maze and more. Get into the harvest spirt and celebrate the season. Daily events: Hay Bale Maze-Mon. through Fri.; Cookie Decorating-Tues. and Thur.; Sugar Skull Coloring Station-Mon., Wed., Fri.; Hot Cider Station-Fri. and Pumpkin Creativity Contest: cast your vote for the best pumpkin display, Fri. FREE Ronald Reagan Building, Washington, DC.

October 24 Halloween Fest. Kids ages 5+. 1 to 3 p.m. Wear your Halloween costume to this celebration of natures weird and wonderful creatures. Learn the fascinating true stories behind carnivorous plants and the fanged animals that live on blood: vampire bats, leeches and much more. Ghoulish games, creepy crafts and sinister snacks make this a fright fest of fun. Preregister. $$ Green Spring Gardens, Alexandria, VA.

October 21, 22 and 23 The Best Haunted House Ever. Kids ages 6+. Times vary. When students from two different high schools sneak into a local haunted house to scare their classmates, utter chaos ensues. At first it seems like the students are just pulling Halloween pranks, but when a spooky zombie and mysterious ghost don't fit into the students' haunting plans it can only mean one thing-they are not alone in the house! Tickets online. $$ Thomas Jefferson Community Theatre, Arlington, VA.