Balloons are items in Bad Piggies, first introduced on When Pigs Fly.
Use
Balloons are used to lift up vehicles, but only connects to Boxes. These are useful if the player wants to go up, or when the level gives no other items that lifts boxes up, such as Fireworks, and Helicopter Rotors.
Physics
Balloons comes in 3 packs: Single, Double, and Triple Balloons. Triple balloons has more force than the 2. But even though they are just a normal balloon with another, they are not equal. As shown below, 2 single balloons does not have the same force as one double balloons.