Students can construct, examine and explain simple machines to develop a deeper understanding of how they work. Set contains enough pieces to build a lever, pulley, inclined place, wheel and axle and a wedge - all at the same time. Modify machines with 4 included weights (2 x 5g and 2 x 10g) and 8 included rubber bands to explore effort, force, load, motion and distance. Labelled pieces assemble easily and separate to store. 63 piece set including activity guide. 10yrs+.