Join Ty and Karlie — the young engineers featured in the other Kids First early engineering kits — to build four awesome geared machines and learn all about how gears work. Great introduction to gears, gear ratios, transmissions, power, and torque for preschoolers and young learners. Large, durable plastic building pieces are perfect for small hands and safe to use. Beautiful and fun illustrated manual includes clear and detailed step-by-step assembly instructions and questions to get young engineers thinking and trying new configurations. Develops fine motor skills, visual-spatial skills, and reasoning and concept skills. Safety Information WARNING. Not suitable for children under 3 years. Choking hazard — small parts may be swallowed or inhaled. Keep the packaging and instructions as they contain important information.