Originally appearing in the 1960's, Gakken's My Kit 150 inspired generations of electronic engineers with its fascinating array of electronic experiments. Now it's back, and just as fascinating as ever! With 150 different experiments ranging from making radios and amps to wireless microphones and electronic organs, My Kit 150 features enough electronic wonder to turn anybody into an engineer! Set includes everything needed to perform all 150 experiments, except for the required 4 AA batteries, which are not included.