OVERVIEW: Mystery Build is offering $15,000 in awards to participants who can create something amazing using only the materials in a Mystery Build Kit, without knowing what they will have to work with. You can expect to find some common sculpting materials like wood, clay, metal, fiber, and plenty more. The kits are 12″ x 9″ x 3″ and contain 5 lbs. of materials. All 2013 Mystery Build Kits are identical.