This DIY welding kit is used to install a fun mini- game kit. The working principle of this kit is: using the Ampere force generated by the electromagnetic field in the electromagnetic system to accelerate the metal rod. This is a great DIY electric kit, you be more familiar with electronic components and learn more interesting electronic knowledge. The kit requires little soldering, wiring the circuits, and assembling the components. This is not exactly a beginner project, but a good project for someone with experienced supervision or basic skills. With 60 solder points and 64 components, you can learn relevant circuit knowledge as well as improve your hands-on skills., Weight: 0.51588169308 Pounds, Manufacturer: Fobufue