Finding a skull in the free version of Bad Piggies.
A skull is a collectible item in the Bad Piggies game, and are the counterparts of the Golden Egg.They appear as the skulls of the normal pigs, Corporal Pigs, and Foreman Pigs. However, the game only has their skulls. So far, there are 45 skulls in the Tusk Til' Dawn update.
Usage
The skull acts like a Star Box and a dessert. They are collectible, but are rare and hard to find and get.
After obtaining 10 skulls you can unlock a new Find the Skulls Sandbox.
Currently, their use is to unlock the "Find the Skulls" Sandbox level and for iOS/Android users, Achievements.