In an attempt to collect a lot of love blueberries, crow to be able to use the magic, use magic to increase the blueberries. To harvest a large blueberry is great fun for children. It is sometimes not only ahead of the other players, to let go to swamp the crow, the other children will not need help. To gather blueberries most, when the game was over, players are leaving a lot most is the winner. (From the rule book)