Specifications High-concerned chemical:None Theme:Fantasy & Sci-Fi Warning:Not suitable for children under three years old Certification:CE Origin:Mainland China Recommend Age:6-12Y,14+y Innovative Children's Circuit Board STEM Science Set - Electronic Assembly Model | Best DIY Educational Toy & Gift Developing Core STEM Skills: Focusing on the four major areas of science, technology, engineering, and mathematics, children intuitively understand circuit principles, current conduction, and component functions during the assembly process. From "Theory" to "Practice": Let children connect circuits and install components by hand, witnessing the moment a light bulb lights up and a small fan rotates, feeling the sense of accomplishment of "creativity" and inspiring a desire for exploration. Multiple Buildable Styles: The set includes a variety of electronic components that can be assembled into a variety of fun shapes, such as a light bulb model, a mini fan, a simple alarm, and a rotating colored light (specific styles depend on the set configuration), satisfying children's need for repeated exploration. Safe and Easy-to-Use Design: All components have smooth, burr-free edges and use a low-voltage safety power supply to avoid the risk of electric shock. Precise component connections allow children to complete assembly by hand without complex tools, lowering the barrier to entry. Reusable Assembly and Disassembly: Durable components allow for repeated disassembly and reassembly. Creative combinations and experimentation with different circuit combinations foster innovative thinking and problem-solving skills.