For your Barbie party theme, here is a game idea that can be altered to fit the Barbie party theme.
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ZOMBIE: Two pairs participate in this game. Each pair stands hand in hand with their adjoining hands tied together. With their free hands (one with the right hand and other with the left one) they must wrap up the package, bind the rope round it and tie it a bow. The pair which finishes the task the first is the winner.