“Spider-Man: Brand New Day” opens this week, and stars from the film have been celebrating the occasion with high-profile appearances. Wednesday, Sadie Sink makes one such appearance, dropping by “The Tonight Show Starring Jimmy Fallon” for an interview. She also joins Fallon for a “You Read My Mind” game. Filmed in advance, Wednesday’s “Tonight Show” also features an interview with Fabien Frankel. First-look photos of Sadie Sink’s appearance follow.