KidWind Red Blade Set, 8-inch diameter wind turbine blades are optimized to spin at very high RPMs, fit on any DC generator or motor with a 2 mm driveshaft, Recommended for College, High School, and Middle School Science
Cube, Individual cubes for density experiments, Available in eight different materials: acrylic, aluminum, brass, copper, nylon, polypropylene, PVC, and steel, Each material is represented by a 1/2inch, 1inch and 11/2inch cube