The Nation’s T-rex has returned to the Smithsonian’s National Museum of Natural History and his towering skeleton has been drawing big crowds to the amazing Deep Time exhibition. Join Smithsonian Associates for a post-Halloween Smithsonian Sleepover on Nov. 2 to avoid the crowds and spend plenty of quality time with your favorite dinosaur. Wear a Halloween costume one more time. Children ages 8 to 14 may participate. There must be at least one adult for every three children in any group that registers. Chaperones must be 21 years or older. No adults without children. To register call 202-633-3030 or visit smithsoniansleepovers.org.