Build your own Marble Run with the Teifoc brick and mortar construction kit using real clay bricks and cement. Teifoc is a unique build and play system that uses real reusable bricks and building plans to create fun and elaborate structures and creations. This set includes detailed plans and the following materials: 210 piece assorted bricks, bag of cement mortar, mixing bowl and masonry trowel. The cement is safe and soluble in water so that the bricks can be reused again and again. The Cement bag gives you extra mixing cement so you can continue to create your marvelous structures! Teifoc is totally safe and adequate for children. To dissolve the cement, leave the building in water for 2 hours. Then rinse the bricks, leave them to dry, and start all over again using new cement. Begin your building adventures today with the Teifoc Marble Run Construction Set!