Description: Fun and Learning: DIY physical learning kits, circuit experiment kits . It is fun and educational electricity experiments, for students .DIY Assembly: Science physical projects, come with unfinish parts and instruction: assemble the experiment by yourself .Enhance Physical Knowledge: Through simple circuits experiments, children can deepen their understanding of assemble series and parallel circuits .Class Educational: DIY physical can help kids learn the basic structure and principle of conducting electricity experiment .Nice Gift: Great interesting physical educational toy, also good for parent child interactive game, also nice gift for kids, teens, adults . Specification: Material: PP Size Chart: Small Circuit Board: 7 .5cmx4cm/2 .95inchx1 .57inch Package Includes: 2 Small Circuit Board2 Battery Switch Boxes5 Wires1 Single Switch Board2 Batteries2 Small Bulbs1 Manual