Electronic educational block kit W-2289 Pass the EN-71 2289 assemble methods,many designs ... of real circuits,so they are easy to follow and set up. Common circuits like those for lighting up an ... music doorbell,a buzzer,FM radio,or recorder can be set up and activated by magnet,touch,water,etc,within ... just two minutes. As soon as a circuit is set up,one could listen to FM stations,observe a flickering ...