K nex 79008 2176 piece building simple machines class set for up to 26 students k nex 79008 the k nex 79008 building simple machines class set helps to introduce your students to the scientific concepts associated with simple machines including levers pulleys inclined planes gears wedges screws wheels and axles p p the set makes 15 different models and contains 2176 k nex parts sufficient for 24 to 26 students p k nex 79008 building simple machines class set