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 -Color:Assorted Color -Material:Plastic, glass, iron, copper -Size:9.00X3.00X3.00cm/3.54X1.18X1.18in -Size:18.00X0.50X0.50cm/7.07X0.20X0.20in -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: 2 x battery boxes(battery excluded) 3 x wires 1 x bulb 1 x 1 x lamp holder