Whenever this pandemic finally ends, here’s one thing we know for sure: There will still be plenty of books to buy in Rockville. Construction has been moving along at Congressional Plaza, and the new Barnes & Noble sign is finally up. In case you haven’t heard, the bookstore will be moving across the street from its longtime home at Montrose Crossing. (Timetable? No one knows right now.) Meanwhile, Congressional Plaza also lost a longtime tenant this week: Child’s Play, one of our last locally owned toy stores, has closed its doors in Rockville. Owners say the exit is permanent, and it’s unrelated to coronavirus.