This electric learning kit is the great fun educational kids and teenage who like STEM and science projects, can well develop kids learning skills and hand-on ability. The traffic lights assemble kit can inspires kids curiosity and creativity, well learn simple principles. Features - Color: As Shown. - Material: Plastic. - Size: 8.00X4.00X11.00cm/3.14X1.57X4.32inch. - Battery: 2AA batteries (not included). - This product is aimed at training children with hand-eye coordination and hands-on ability at the same time to improve intellectual development. - Bring much more joy to your kids. Your kids will learn so much in the process of having fun. - Through the interesting process of DIY assembly learning, you can really feel the joy of continuous conquest. - Exercise children's ability to use their hands and brains, learn science and technology knowledge. - Suitable for children 6-12 years old, perfect for Children's school physics science STEM engineering projects. Package list: 1 set x kids toy