Includes 2 jumper wires, 3 one-snap wires, 6 two-snap wires, 3 three-snap wires, 1 four-snap wire, 1 five-snap wire, 1 six-snap wire, 1 whistle chip, 1 alarm, 1 motor, 1 fan, 1 slide switch, 1 press switch, 1 photoresistor, 1 red light emitting diode, 1 lamp socket, 1 battery holder, 1 speaker, 1 music circuit, 1 space war circuit, 1 resistor, 1 base grid, 1 instruction book, 1 block layout sheet. (34 pieces)