Im trying to find the name of a movie I seen in the late 80's and early 90's. It was about a marsian family of four, there youngest kid got lost. They ate skittles and drank coke through a straw. They used to communicate with there hands, they put there hands together like a V and they wisthle through them.

Need help thanks!

Mac and Me (1988) (http://www.imdb.com/title/tt0095560/)