There was an alien movie where a couple of children are able to build a spacecraft that is shielded by a powerful transparent bubble. They drink Tang because the astronauts of those days made television commercials referencing Tang as their daily breakfast drink. The alien has been watching human television channel broadcasting and mimics the sounds a voices of television broadcasts. Here's Johnny, It's a NEW CAR!! And other sounds are directly copied by the alien. It is a children's movie and appeared at least once on television as well. Would you please tell me the name of this movie?

Explorers (http://www.imdb.com/title/tt0089114/)