Remember the golden age of radio? Scientific Explorer’s Crystal Radio Kit brings back the old memories and makes new ones! Kids will learn how to build their own working radio, pick up radio stations and experiment with radio waves. No batteries needed! Building a radio is a classic science experiment for kids, and this kit will make it even more fun! This science kit is a great educational gift for kids 8 and up! This kit includes:1 diode,1 base,4 rubber bands,1 tuning rod,2 connecting wires,1 coil wire,Sand paper,1 earphone,3 nuts,3 bolts,4 washers,1 coil tube,1 tuning ball,Instruction manual