Description: 6 sets DIY educational toy, analog circuit , energy conversion ,balance Principle, and other meaningful scientific experiments Help students and children learn physical electrical knowledge (series circuit and parallel circuit) and other physical knowlege DIY assembly toy, let kids bulid it on their own hands, then explore principle from the funny process of experiments A series of physical science boarden kids and children horizon, stimulating their curiosity A great DIY educational toy for kids and student to have a hands-on experience and the sense of achievement SizeL*W*Happrox. 30*28*9.7cm/ 11.81*11.02*3.81inch Specification: Windmill car Assemble the wire of motor 1. Connect the black wire of battery box to to end of motor connect the red wire to the left of switch 2. Use the spare wire to connect the other end of motor with the middle of the switch Earthquake Alarm Step one: find and know the accessory marked A-H Step twoAssemble the device 1. Tighten D (bolts ) as the No.1 picture show of instruction 2. Assemble the A B C as the No.2 picture show 3. Insert the Fbuzzeronto the hole of top and attach battery box as the No.3 picture show 4. Connect the red wire of battery box with red wire of Fbuzzerwhite wire of Fbuzzerwith the ring of D (bolts ) 5. Decan the wireH, connect with the ring of top bolts thought ring of bolts on the stake 6. Connect black wire of battery box to ring of bolts on the stake Package Includes: 1 Windmill car 1 Earthquake Alarm 1 Seesaw 1 Cable-stayed bridge 1 Excavator 1 Wind Turbine 1 Parts are needed to self-assembly refering to the detailed steps 2 Due to manual measurement, there may be 1-2mm error in size