This comprehensive bundle includes four of our best STEM products: the Force & Motion Activity Set, the Simple Machines Activity Set, the Magnets Activity Set and the Sink or Float Activity Set. Explore the wonders of magnetism and engineering, why things sink and float, all 6 simple machines and the science of how things go, with colorful, engaging tools and hands-on activities and experiments. Size: 38.1 x 32.3 x 27.7 cm. Ages 5+.