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A three hour round trip to the local blueberry farm (did you know most blueberries are grown organically anyway? At least where I live in Alabama. Very few blueberry pests, I'm told), a bag of sugar, two boxes of Sure Gel (the cheaters way, perhaps- but easy), two boxes of ball jars and one Friday evening canning (with a big caning pot borrowed from my grandma) and I've got about 20 cans of the best blueberry jam in the world. Six months later, a yard of pretty fabric and ribbon cut to fit over the lids makes for $3/jar organic Christmas presents that everyone on my gift list adores - not matter their age, sex or marital status. Not so expensive after all...
(And the older folks, who know this drill, all returned the jars so I can use them the next year.)