What is a series circuit? What is the principle of gear work? How to match the combination of active wheels, driven wheels, and idler wheels? Go ahead, little scientist! with Little Story DIY 48 Pattern Electrical Painting Plotter Instrument by SAMBOX, an educational science kit is designed for children aged 8 - 12 years old. It provides simple knowledge of circuit physics, helps understand basic physical theory concepts of circuit diagrams and gear transmission, lets children do it themselves, stimulates their imagination and creativity, and experiences the charm of science first - hand. The STEM toys provide 36 precision parts and a detailed product manual that allows children to combine circuits and gears with their hands to create amazing mechanical structures and circuit combinations.(2*AA batteries not included) Through simple connection and part building block installation, children's hands - on ability and logical ability are exercised, and scientific principles are explored. The painting instrument experiment can draw 48 different patterns, give full play to children's imagination, and feel the fun of the painting instrument experiment. Best for your li ’l one as birthday gifts, Christmas gifts, party gifts, Children's Day gifts, and New Year gifts. Specifications - Product Dimensions(cm) : 14.5*16*16 Product Weight(kg) : 0.092 Packing Dimensions(cm) : 25*6*20 Packing Weight(kg) : 0.39 Battery: 2*AA battery (not included) Suitable Age(Years) : 8 +