”MythBusters” hosts Jamie Hyneman, left, and Adam Savage. (Charles Dharapak/ASSOCIATED PRESS)
USA Science and Engineering Festival

Highlights: Whether you’re interested in weather, the stars, the environment or chemistry, there are shows, experiments and exhibits. The hands-on activities include building structures from dominoes and then collapsing them. Or you can climb into a giant display that tries to figure out why dinosaurs became extinct. Also not to be missed: TV’s “MythBusters” Adam Savage and Jamie Hyneman explaining their special kind of science.

Where: Walter E. Washington Convention Center, 801 Mount Vernon Place NW.

When: Saturday 10 a.m-6 p.m.; Sunday 10 a.m.-4 p.m.

Who: For all ages

How much? Free.

For information: www.usasciencefestival.