Smashing pumpkins is acceptable behavior at the Children’s Museum of Sonoma County. During the Pumpkin Plop, staff members drop pumpkins from a crane, delighting a crowd of little goblins, pirates, and ninja princesses. The event is part of Fantazmagoria, which includes science experiments, a black-light room, Halloween-themed inflatables, and other non-scary activities. The festivities happen October 28–30, 3–8 p.m., at the museum in Santa Rosa. General admission is $20 or $12 for members. For more information, go to cmosc.org.