Description: Fun and Learning: DIY physical learning kits, conducting electricity experiment.DIY Assembly: Science physical projects, come with unfinish parts and instruction: assemble the experiment by yourself.Working Principle: Electric bar hook conduct with conductive wire, the whole circuit is connected, will , LED will light otherwise, the circuit will not work.Class Educational: DIY physical can help kids learn the basic structure and principle of conducting electricity experimentNice Gift: Great interesting physical educational toy, also good for parent child interactive game, also nice gift for kids, teens, adults. Specification: Material: Wood Size Chart: L x W x H: 14cmx6cmx21cm or 5.51inchx2.36inchx8.27inch Package Includes: 1Set Conducting Electricity Experiment Toy