Don’t let the heat wave fool you: It’s pumpkin season. If you need proof, you can find it tomorrow at the Topsfield Fair, where dozens of farmers will haul in Jabba-the-Hutt-sized gourds as part of the fair’s Giant Pumpkin Contest. Last year’s winner tipped the scales at 1,347.5 pounds—about half the weight of a Mini Cooper. (Bostonist also recommends checking out the fair’s birds of prey, chick hatchery, and racing pigs.) But if you can’t......