Teifoc sets are the ultimate learning tool for aspiring engineers, teaching children valuable hands on motor skills, learning how to follow directions, and basic STEM skills. They offer unique build and play systems that use real, reusable bricks to create fun and elaborate structures. The bricks are made of cooked clay, and castles and landscapes are made using soluble sand and corn-extract based mortar. All are totally safe for kids to play. Teifoc products are designed, engineered and manufactured in Germany.