Don’t know who they are? Just ask your grandchildren. Nat & Alex are the stars of Nickelodeon’s The Naked Brothers Band. No, they’re not naked. But they do play cool music. At the Sixth and I Historic Synagogue. (website)

The holidays are a time of giving, and what better way to teach your grandchildren about the true spirit of giving than with this annual event. Drop off your nonperishable food items so that others might enjoy a nice holiday dinner. At the Young Chefs Academy, Rockville, Md. (website)

No automobiles, but lots of cool miniature trains, villages, tunnels, planes, depots, and more to keep your grandchildren fascinated by this constantly moving display. At the College Park Aviation Museum, College Park, Md. (website)

Talk about a teaching moment with your grandchildren. This 10th annual event is a multicultural celebration of all holiday events that take place in winter – Christmas, Chanukah, Kwanzaa, Ramadan, Devali, Sankta Lucia, and Los Posadas. At Discovery Theater. (website)

For real American history, here you go — an interesting story to share with your grandchildren. To commemorate the Treaty of Paris, which ended the American Revolution, an exhibit highlights the earliest surviving full-length oil portraits of four Native Americans. In 1710, the men were selected to talk about the plight of the colonies to Queen Anne, and were presented to her as kings. At the National Portrait Gallery. (website)