Aim the pig launch near the top of the first line of bones. Your aim should be directed at the connection between the metal chain and the bone.
Power Activation Point
Activate the boomerang as you are about to hit the bones. The boomerang should kill the three birds on the top of the single wooden block.
First Shot Result
The boomerang breaks free the bombs that are hanging. The bombs blow up and destroy the hanging bones. The hanging bones then kill the rest of the birds by crushing their structures. You end up with the three star rating with this easy stage.