Bad Piggies Rise and Swine Level 2-16 is 3-starred using a two contraptions. Place Freckles in a wooden frame with the grappling hook in front at a 45 degree angle. Then simply send the plunger into the cliff to pull him down the crevasse. Repeat the same thing with a steel frame to collect the snap krack star.
If you have a different strategy for completing this level feel free to leave a comment below.