Bad Piggies Flight in the Night Level 4-16 can be three starred using a single contraption. This is a pretty fun level. Use the metal boxes to create an anchor, then let the pig in a wooden structure fall off the ledge, swinging by the rope. Use the bellow to swing the pig, grabbing the star boxes before cutting the rope!
If you have a different strategy for completing this level feel free to leave a comment below.