Fantastic set, full of experiments. It includes 153 experiments and theoretical explanations in the fields of electronics, magnetism, electricity and electromagnetism. There are 43 different components in the set, easy to perform and learn. Includes: compass, electric key, electric heater, potentiometer, electromagnet, Morses telegraph, electric bell, Wagners hammer, bulb, resistance meter, speaker, light show, pulsating light and many other necessary devices. A clear and informative manual with illustrated experiments.