K&rsquo;NEX Education &ndash; Simple and Compound Machines Set &ndash; 352 Pieces &ndash;  Ages 9+ Engineering Educational Toy Build 16 fully-functioning replicas of real-world machines (one at a time) Expands students' knowledge of simple machine concepts through hands-on learning Includes 352 K'NEX parts all packaged in a convenient storage box Includes building instructions and comprehensive Teacher's Guide Aligned to STEM (science, technology, engineering, and math) concepts national standards For 5th through 9th grade classrooms Building instructions and comprehensive teacher's guide included