A thematic approach through real-life machinery around the house, this set introduces students to more advanced gear mechanisms. The set includes 46 elements including Technic large-scale elements like gears, wheels, axles, worm and crown gears, 4 full-color, laminated building instructions, an element survey and a storage box w/lid. Short preparation time. Does not require technology experience. Developmentally appropriate for age group. Ideal for introducing mechanisms to younger children.