BE A YOUNG ENGINEER: Children learn the physics of parallel/series connections through science kits’s interesting flying saucer fan accessories, rotating gyroscopes, and suspended balls, allowing children to freely combine, expand their thinking, develop different ways of playing, and ignite their passion for circuit exploration! BUILD OVER 540+ PROJECTS: This science toys contains 53 circuit components, allowing children to create more than 540 exciting projects, turning daily playtime into exciting STEM adventures, from simple circuits to complex logic systems, improving children's problem-solving abilities and creativity. EASY TO BUILD TO PLAY: Includes a clearly illustrated color manual and 5 instruction cards, making it easy for children to understand and complete all experiments while building their confidence and staying focused.