Sands Alive! Sunken Castle Discovery set includes 2 pounds of Sands Alive!, 4 deluxe castle molds, 5 mini castle topper molds, wall and column molds, 3 extruders and brick and pebble pavers with interchangeable handle. To add even more play value, the package opens up and turns into its own Sunken Castle World, complete with reusable stickers to create your own background art. All the fun of sand without the mess! The unique, non-toxic formula prevents bacterial growth.