Now through July 23 "Grease" Comes to Arts Barn. Kids ages 14+. Dates and times vary. In partnership with Wildwood Summer Theatre (WTS), Arts on the Green presents the iconic 50s rock and roll musical, Grease, with book, music and lyrics by Jim Jacobs and Warren Casey. The entire company of WTS is aged 14 to 25. Tickets online. $$ Arts Barn, Gaithersburg, MD.

Now through August 6 Children's Theatre-in-the-Woods. Kids 4+. Tuesdays through Saturdays 10:30 a.m. Performances range from music and dance to puppetry and storytelling-interactive, educational and fun. Bring a picnic lunch to enjoy after the show. Tickets online. $$ Wolf Trap National Park, Vienna, VA.

July 21 Backyard Theater for Children. All ages (family-friendly event). 9:30 and 11:30 a.m. Strathmore Backyard Theater brings families together for concerts that are entertaining, educational and perfect for all ages! Today's entertainment: The Uncle Devin Show, this interactive musical experience uses percussion instruments to cultivate young minds. Tickets online. $$ Strathmore, North Bethesda, MD.

July 21 Thursday Night Campfires: Paul Bunyan. Kids ages 3+. 8 to 8:45 p.m. Spend your evening at our campfire roasting marshmallows while enjoying Walt Disney's 1958 Paul Bunyan cartoon. Preregister. $$ Meadowside Nature Center, Rockville, MD.

July 22 Dairy Days. All ages (family-friendly event). 1 to 4 p.m. Churn butter, crank ice cream and play historic games for a taste of 18th century life at Sully Historic Site. Ice cream and butter will be made at 1, 2, and 3 p.m. Tickets online. $$ Sully Historic Site, Chantilly, VA.

July 23 Celebrate Natural Parenting at MommyCon. 9:30 a.m. to 5 p.m. MommyCon takes a gentle and positive approach to educating parents about the emotional and physical benefits of natural birthing, breastfeeding and babywearing. We advocate values of holistic health, eco-friendly diapering, child safety standards and procedures, and female self-care and wellness. The MommyCon experience comprises a full day of educational panels and workshops plus a product showcase hall of more than 50 exhibitors. $$ Walter E Washington Convention Center, Washington, DC.

July 23 Book Signing. All ages (family-friendly event). 2 p.m. Acclaimed children's author, Chris Grabenstein will read and sign copies of his new book "Mr. Lemoncello's Library Olympics." This is the third book in his Mr. Lemoncello's Library Series. He also co-wrote several series with James Patterson including "I Funny," "Treasure Hunters" and "House of Robots." FREE Barnes & Noble Tysons Corner Center, McLean, VA.

July 23 Saturday Mornings at the National. Kids ages 4 to 10. 9:30 and 11:30 a.m. These programs engage and inspire the young mind. Play, laugh, learn and discover through interactive performances, puppets, dance and music that are designed to light up the imagination and celebrate a world of wonder. Today's entertainment: Traveling Lantern - "Vladimir Goes for the Gold!" FREE National Theatre, Washington, DC.

July 24 Children's Film Program: Discover Rembrandt. Kids ages 4+. 11:30 a.m. Join us for three animated short films based on children's books. "Getting to Know the World's Greatest Artists: Rembrandt," "Art," which introduces children to the imaginative world of art and how a picture really can be worth a thousand words and "The Cow Who Fell in the Canal." FREE National Gallery of Art, Washington, DC.

July 26 Animals Underground. Kids ages 2 to 5. 9:45 to 10:30 and 11 to 11:45 a.m. Dig down deep and investigate who lives in the dark, damp world under the forest floor as we learn about moles, earthworms, termites and the many other creatures of the soil. Preregister. $$ Hidden Oaks Nature Center, Annandale, VA.