material is made of electronic components, plastic. Easy to use, follow the detailed assembly instructions, DIY design, which will produce electricity, it can arouse students' interest to learn, and achieve good educational effect. Features - ColorAssorted Color - Material: Electronic components, plastic - Size: 5.00X5.00X2.00cm/1.97X1.97X0.79in - Battery: 3pcs AA batteries(not included) - Owning the and break resistance ability, very practical, with excellent texture. - By completing the circuit science experiment project with your child, let your child experience the science. - Used in electrical experiments in primary and middle schools or home DIY circuit test, arouse students' interest. - Develop your child's imagination and hands-on ability, this science toy makes your child more interested in scientific experiments. - Make your kids keep from computer game and cellphone, and play this interesting experiment. Package list: 1 x circuit board 1 x set of components 1 x empty AA-battery box