The STEM Multipurpose Tetris Set is a building toy complete set that allows children to explore the world of STEM through play. The set includes various blocks that can be used to build different shapes and structures, promoting creativity and problem-solving skills. The Tetris theme adds a fun and engaging element to the building process, making it an enjoyable activity for kids. Overall, this toy is a great way to introduce children to the world of STEM and encourage their curiosity and imagination.