Greece: home of the Olympic Games -- Jimmy's parents are aliens -- Marvelous marsupials: a guide to kangaroos -- Robot Museum: tour gone wrong -- World News -- Are you getting the message? -- Don't whistle up the wind -- Pet of the week -- Get up and go! -- Glaciers: rivers of ice -- Serf's up -- You do what for a living? -- Moon cruiser -- What makes a planet a planet? -- Diver: the leatherback sea turtle -- Design your own car -- Tunnel vision: building an underwater tunnel -- The well.