Blueberries are a food item found in the Riverside village.
They become available at Level 15, and unlocking them takes 1 day, 12 hours.
Foraging for Blueberries takes 15 minutes, and yields 25 berries. You will need a Willow Box and a Nickel Knife.
Eating Blueberries provides 22 Happiness Points to your villagers per berry eaten.