Completing "world Lego" hints and tips for Lego Star Wars: The Complete Saga

Completing "world Lego"

I have two young boys who really like blowing things up and stuff(and who could blame them?). They get into Lego world (or level) and destroy everything, giving them lots of "money" but they can never figure out how to complete it. I am guessing it has to do with the heli-pad to the right of one of the buildings, but the levers won't stay down (green)...anyone help?? You will make their day if you can....

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