Garth and Bev - Megaphone

Animation about a time-travelling brother and sister called Garth and Bev, who live in harmony with nature in their village. They are transported to different times and places by the Time Spiral and solve problems with the help of Grandfather Lir. Fiann the Farmer has to make a speech at the harvest festival, but he's lost his voice. Bev thinks she can find it hidden somewhere, while Garth knows they need to follow Grandfather Lir's advice if they are to discover something new and earn a trip in the time spiral: the clue is in the shape.