The Incredible Cousins and the Magic Caboose

Six cousins discover an abandoned train caboose in the woods and decide to make it their clubhouse. When they learn that the caboose has magic powers, they settle in and start having the time of their lives. But, one day a witch shows up, says the clubhouse belongs to her and demands they return it to her. When they refuse, a struggle begins that might just cost the cousins a lot more than their beloved clubhouse.