After a delay of several months, the National Children’s Museum, 1300 Pennsylvania Avenue, NW, has opened. The Museum is open daily, except certain holidays, from 9:30 a.m. to 4:30 p.m. General admission tickets are $10.95 for children over the age of one and adults. All tickets are timed entry. They encourage booking ahead of time to ensure availability for your preferred date and time. nationalchildrensmuseum.org.