Now through August 27 100th Anniversary of the National Park Service. All ages (family-friendly event). Times and locations vary. It's a week-long celebration with special events, festivals and ranger programs on the National Mall, America's most visited national park. Includes creating the largest living NPS emblem, a hip, high-energy evening concert and beer garden with music and comedy; a family fun festival in Constitution Gardens; and scavenger hunts to and in search of national parks across Washington, D.C.! FREE National Mall, Washington, DC.

August 25 Livning National Park Service Emblem. All ages (family-friendly event). 9 a.m. Be a part of the world's largest National Park Service emblem created on the grounds of the Washington Monument on our 100th birthday! Participants will be assembled into a living Arrowhead using brown, green and white umbrella; then an aerial photo will be taken. First 1,000 people will receive a t-shirt and get to keep their umbrella. FREE Washington Monument grounds, Washington, DC.

August 25 Rangerpalooza. All ages (family-friendly event). 10 a.m. to 5 p.m. The green and gray uniform and ranger's "flat hat" are among the most recognized features of the National Park Service. Kids can try on NPS uniforms, see how the uniform has evolved through the years, earn a junior ranger badge, and learn about the many jobs in NPS that protect America's scenic wonders and historic sites. FREE Lincoln Memorial, Washington, DC.

August 26, 27 and 28 Nintendo Tour 2016. All ages (family-friendly event). 10 a.m. to 9:30 p.m. and Sunday 11 a.m. to 7 p.m. The event will include; character appearances, games, a claw machine and prizes. FREE Tysons Corner Center, Bloomingdales Court, Tysons, VA.

August 27 America's Front Yard Family Festival. All ages (family-friendly event). 10 a.m. to 6 p.m. Featuring live music, storytelling and other activities, highlighting today's youth as the future stewards of our national parks. The rock band for kids Milkshake headlines the lineup that includes Ellis Woodward, Uncle Devon, Yosi & the Superdads, the Great American Indian Dancers and many more. Also face painting, juggling, a corn maze, Lego models of national parks, virtual reality park tours and so much more! FREE Constitution Gardens, Washington, DC.

August 27 Melody's Summer Block Party. All ages (family-friendly event). 11 a.m. to 3 p.m. Get a glimpse of the new American Girl character's world. Every girl attending will take home a free doll-sized tee (while supplies last). FREE Tysons Corner Center, American Girl, Tysons, VA.

August 27 Movie Under the Stars. All ages (family-friendly event). 7 to 9 p.m. Join us for "E.T." on the big screen near the fountain. Bring blanket or chairs! FREE Stonebridge at Potomac Town Center, Woodbridge, VA.

August 28 Eye Run for POB. All ages (family-friendly event). 8 to 11 a.m. A 5K and fun run to save sight! Visit the Vison Health Fair for eye health info and free adult and child vision screenings. Enjoy Kids Camp in celebration of children's author Valerie Tripp and Boys Camp Books. Pregister online. $$ Westfield Montgomery Mall, Bethesda, MD.

August 29 Wings of Fancy Live Butterfly, Caterpillar Exhibit. All ages (family-friendly event). Daily 10 a.m. to 4 p.m. The seasonal display features hundreds of live butterflies from all over the world. Visitors can learn about their amazing metamorphosis, the important role butterflies play in having healthy ecosystems, and how to ensure these beautiful insects thrive in our own gardens. FREE Brookside Gardens, Wheaton, MD.

August 31 Little Tots Summer Fun. All ages (family-friendly event). 10:30 a.m., every other Wednesday. Join us for fun and lively family entertainment on the Plaza stage. Bring your little tot's swimsuit and a towel for fun in the interactive splash fountain after the event! Today's entertainment: Rocknoceros. FREE Fairfax Corner, Fairfax, VA.