Age 8+, builds 7 models, supports 2-3 students.The Introduction to Gears set allows students to explore how different types of gears work and the concept of gearing up and gearing down.198 pieces to build 7 different gear models, including 2 spur gear, 2 crown gear and 2 chain socket gear examples.Models include Egg Beater, Blender, Chainsaw, Record Player, Crank Fan, Car Window and Exercise Bike.Set supports a team of 2-3 students for Key Stage 2.Detailed teachers guide with key concepts, terms definitions and learning objectives and lesson plans included.