It is a teaching aids toy, adopts scientific design, a great toy for kids, not only can enjoy themselves, but also can learn some scientific knowledge, and improve their hands-on ability also. It can attract the kid's attention to enjoy the fun of playing. Features - Color: As Shown. - Material: Plastic. - Size: 8.00X4.00X11.00cm/3.14X1.57X4.32inch. - Battery: 2AA batteries (not included). - Made of premium quality materials, safe, practical and to use. - It can easily arouse children's interest in scientific physics experiments. - The product has very smooth edges in result in No scratch injure for kids hand. - Give full play to children's imagination and promote children's intellectual development. - Creative and vivid traffic lights toy model kits can effectively help children improve safety awareness. Package list: 1 set x kids toy