Students can construct, examine, and explain simple machines to develop a deeper under'standing of how they make work easier. Supports STEM and critical-thinking skills. Contains enough pieces to build a lever, pulley, inclined plane, wheel and axle, and wedge-all at the same time. A 5-in-1 value! Modify machines with 4 included weights (two 5 g and two 10 g) and 8 included rubber bands to explore effort, force, load, motion, and distance. Labelled pieces assemble easily and separate to store. Includes Activity Guide. Ages 10+