Looking for a fun, easy science experiment for kids? This circuit kit can satisfy your needs, and a great addition to a classroom lesson plan. When conducting these experiments, stimulate children's curiosity and Intelligence, let them have more fun. Features - ColorBlack -Material:Plastic, glass, iron, copper - Size: 6.50X4.00X3.00cm/2.55X1.57X1.18in - Size: 20.00X1.00X0.50cm/7.86X0.39X0.20in - Size: 18.00X3.00X1.00cm/7.07X1.18X0.39in -Voltage of the bulb:2.5v. -Power supply:2 x AA batteries(not included) - Aimed at training children with hand-eye coordination and hands-on ability, this circuit kit can improve intellectual development. - It is an essential electrical consumable for primary school science, secondary school physics laboratory and student home laboratory. - The tiny circuit tools can bring much more joy to your kids and they will learn so much in the process of having fun. - This science toy allows kids to conduct multiple experiments and is great to share with family, friends, or classmates. - Easy to use, not only for home, but also for school, can better attract students, cultivate their active learning towards science. Package list: 1 x battery box(battery excluded) 2 x wires 2 x lamp holders