could you please help me find this kids scifi movie. i remember i think the name of the movie starts with letter 'A' and is one world. like ARKANOID or something. i remember a boy and a girl and they found out that they are not from earth or something. and also a spaceship which is hidden in a military base and the scientists there cannot open it until those kids go there open the doors of that spaceship because are the chosens and fly it away to protect earth or from aliens or something. please help i am trying to remember this movie for years now. Thanks!